diff --git a/Cargo.toml b/Cargo.toml
index ed10070..6632bde 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -15,11 +15,11 @@ homepage = "https://github.com/zkat/big-brain"
 [workspace]
 
 [dependencies]
-bevy = { version = "0.14.0", default-features = false }
+bevy = { version = "0.15.0", default-features = false }
 big-brain-derive = { version = "=0.21.1", path = "./derive" }
 
 [dev-dependencies]
-bevy = { version = "0.14.0", default-features = true }
+bevy = { version = "0.15.0", default-features = true }
 rand = { version = "0.8.5", features = ["small_rng"] }
 
 [features]
diff --git a/examples/custom_measure.rs b/examples/custom_measure.rs
index aa61971..0d9378c 100644
--- a/examples/custom_measure.rs
+++ b/examples/custom_measure.rs
@@ -34,7 +34,7 @@ pub struct Pancakes(pub f32);
 pub struct Waffles(pub f32);
 
 pub fn eat_dessert(time: Res<Time>, mut pancakes: Query<(&mut Pancakes, &mut Waffles)>) {
-    let delta_t = time.delta_seconds();
+    let delta_t = time.delta_secs();
 
     for (mut pancake, mut waffle) in pancakes.iter_mut() {
         pancake.0 = (pancake.0 - delta_t).max(0.0);
@@ -101,7 +101,7 @@ fn eat_thing_action<
                 ActionState::Executing => {
                     debug!("You should {:?}", action_marker);
 
-                    item.eat(time.delta_seconds() * 5.0);
+                    item.eat(time.delta_secs() * 5.0);
 
                     // we should stop at some eating pancakes at some point, unfortunately
                     if item.get() > 80.0 {
diff --git a/examples/farming_sim.rs b/examples/farming_sim.rs
index 4f7e075..cc77578 100644
--- a/examples/farming_sim.rs
+++ b/examples/farming_sim.rs
@@ -73,7 +73,7 @@ pub struct Fatigue {
 /// Increases an entity's fatigue over time
 pub fn fatigue_system(time: Res<Time>, mut fatigues: Query<&mut Fatigue>) {
     for mut fatigue in &mut fatigues {
-        fatigue.level += fatigue.per_second * time.delta_seconds();
+        fatigue.level += fatigue.per_second * time.delta_secs();
         if fatigue.level >= 100.0 {
             fatigue.level = 100.0;
         }
@@ -111,7 +111,7 @@ pub struct Sleep {
 // the Sleep component's parameters.
 fn sleep_action_system(
     time: Res<Time>,
-    mut fatigues: Query<(&mut Fatigue, &Handle<StandardMaterial>)>,
+    mut fatigues: Query<(&mut Fatigue, &MeshMaterial3d<StandardMaterial>)>,
     // Resource used to modify the appearance of the farmer.
     mut materials: ResMut<Assets<StandardMaterial>>,
     // We execute actions by querying for their associated Action Component
@@ -133,7 +133,7 @@ fn sleep_action_system(
                 }
                 ActionState::Executing => {
                     trace!("Sleeping...");
-                    fatigue.level -= sleep.per_second * time.delta_seconds();
+                    fatigue.level -= sleep.per_second * time.delta_secs();
                     materials.get_mut(material).unwrap().base_color = SLEEP_COLOR;
 
                     if fatigue.level <= sleep.until {
@@ -208,7 +208,7 @@ pub struct Farm {
 // Farm component's parameters and changes the entity's appearance to indicate the farming action.
 fn farm_action_system(
     time: Res<Time>,
-    mut actors: Query<(&mut Inventory, &Handle<StandardMaterial>)>,
+    mut actors: Query<(&mut Inventory, &MeshMaterial3d<StandardMaterial>)>,
     // Resource used to modify the appearance of the farmer.
     mut materials: ResMut<Assets<StandardMaterial>>,
     // Query to manage the state of the farming action.
@@ -225,7 +225,7 @@ fn farm_action_system(
                 }
                 ActionState::Executing => {
                     trace!("Farming...");
-                    inventory.items += farm.per_second * time.delta_seconds();
+                    inventory.items += farm.per_second * time.delta_secs();
                     materials.get_mut(material).unwrap().base_color = FARM_COLOR;
 
                     if inventory.items >= MAX_INVENTORY_ITEMS {
@@ -398,7 +398,7 @@ pub fn move_to_nearest_system<T: Component + std::fmt::Debug + Clone>(
                 if distance > MAX_DISTANCE {
                     trace!("Stepping closer.");
 
-                    let step_size = time.delta_seconds() * move_to.speed;
+                    let step_size = time.delta_secs() * move_to.speed;
                     let step = delta.normalize() * step_size.min(distance);
 
                     // We only care about moving in the XZ plane.
@@ -455,15 +455,15 @@ fn update_ui(
 ) {
     for (inventory, fatigue) in &mut actor_query.iter() {
         for mut text in &mut money_query {
-            text.sections[0].value = format!("Money: {}", inventory.money);
+            text.0 = format!("Money: {}", inventory.money);
         }
 
         for mut text in &mut fatigue_query {
-            text.sections[0].value = format!("Fatigue: {}", fatigue.level as u32);
+            text.0 = format!("Fatigue: {}", fatigue.level as u32);
         }
 
         for mut text in &mut inventory_query {
-            text.sections[0].value = format!("Inventory: {}", inventory.items as u32);
+            text.0 = format!("Inventory: {}", inventory.items as u32);
         }
     }
 }
@@ -475,11 +475,10 @@ fn init_entities(
     mut meshes: ResMut<Assets<Mesh>>,
     mut materials: ResMut<Assets<StandardMaterial>>,
 ) {
-    commands.spawn(Camera3dBundle {
-        transform: Transform::from_xyz(6.0, 6.0, 4.0)
-            .looking_at(Vec3::new(0.0, -1.0, 0.0), Vec3::Y),
-        ..default()
-    });
+    commands.spawn((
+        Camera3d::default(),
+        Transform::from_xyz(6.0, 6.0, 4.0).looking_at(Vec3::new(0.0, -1.0, 0.0), Vec3::Y),
+    ));
 
     commands.insert_resource(AmbientLight {
         color: Color::WHITE,
@@ -488,26 +487,20 @@ fn init_entities(
 
     commands.spawn((
         Name::new("Light"),
-        SpotLightBundle {
-            spot_light: SpotLight {
-                shadows_enabled: true,
-                intensity: 500_000.0,
-                range: 100.0,
-                ..default()
-            },
-            transform: Transform::from_xyz(2.0, 10.0, 0.0).looking_at(Vec3::ZERO, Vec3::Y),
+        SpotLight {
+            shadows_enabled: true,
+            intensity: 500_000.0,
+            range: 100.0,
             ..default()
         },
+        Transform::from_xyz(2.0, 10.0, 0.0).looking_at(Vec3::ZERO, Vec3::Y),
     ));
 
     // Loading our scene here. Note we'll still need to add components to different parts
     // of the gltf in order to query their positions. We do this through an observer further below.
     commands.spawn((
         Name::new("Town"),
-        SceneBundle {
-            scene: asset_server.load("models/town.glb#Scene0"),
-            ..default()
-        },
+        SceneRoot(asset_server.load("models/town.glb#Scene0")),
     ));
 
     // We'll use `Steps` to execute a sequence of actions.
@@ -538,16 +531,13 @@ fn init_entities(
 
     commands.spawn((
         Name::new("Farmer"),
-        PbrBundle {
-            mesh: meshes.add(Mesh::from(Capsule3d {
-                half_length: 0.15,
-                radius: 0.1,
-                ..default()
-            })),
-            material: materials.add(DEFAULT_COLOR),
-            transform: Transform::from_xyz(0.0, 0.5, 0.0),
+        Mesh3d(meshes.add(Mesh::from(Capsule3d {
+            half_length: 0.15,
+            radius: 0.1,
             ..default()
-        },
+        }))),
+        MeshMaterial3d(materials.add(DEFAULT_COLOR)),
+        Transform::from_xyz(0.0, 0.5, 0.0),
         Fatigue {
             is_sleeping: false,
             per_second: 4.0,
@@ -566,29 +556,26 @@ fn init_entities(
             .when(SellNeedScorer, move_and_sell),
     ));
 
-    let style = TextStyle {
+    let font = TextFont {
         font_size: 40.0,
         ..default()
     };
 
     // Our scoreboard.
     commands
-        .spawn(NodeBundle {
-            style: Style {
-                width: Val::Percent(100.0),
-                height: Val::Percent(100.0),
-                flex_direction: FlexDirection::Column,
-                justify_content: JustifyContent::End,
-                align_items: AlignItems::FlexStart,
-                padding: UiRect::all(Val::Px(20.0)),
-                ..default()
-            },
+        .spawn(Node {
+            width: Val::Percent(100.0),
+            height: Val::Percent(100.0),
+            flex_direction: FlexDirection::Column,
+            justify_content: JustifyContent::End,
+            align_items: AlignItems::FlexStart,
+            padding: UiRect::all(Val::Px(20.0)),
             ..default()
         })
         .with_children(|builder| {
-            builder.spawn((TextBundle::from_section("", style.clone()), MoneyText));
-            builder.spawn((TextBundle::from_section("", style.clone()), FatigueText));
-            builder.spawn((TextBundle::from_section("", style.clone()), InventoryText));
+            builder.spawn((Text::new(""), font.clone(), MoneyText));
+            builder.spawn((Text::new(""), font.clone(), FatigueText));
+            builder.spawn((Text::new(""), font.clone(), InventoryText));
         });
 }
 
@@ -640,7 +627,7 @@ fn main() {
         .add_event::<SceneLoaded>()
         .add_systems(Update, check_scene_loaded)
         // This observer will attach components to entities in the scene based on their names.
-        .observe(
+        .add_observer(
             |trigger: Trigger<SceneLoaded>,
              query: Query<(Entity, &Name)>,
              mut commands: Commands| {
diff --git a/examples/sequence.rs b/examples/sequence.rs
index c740106..04d4306 100644
--- a/examples/sequence.rs
+++ b/examples/sequence.rs
@@ -40,7 +40,7 @@ impl Thirst {
 /// Just a plain old Bevy system, big-brain is not involved yet.
 pub fn thirst_system(time: Res<Time>, mut thirsts: Query<&mut Thirst>) {
     for mut thirst in &mut thirsts {
-        thirst.thirst += thirst.per_second * time.delta_seconds();
+        thirst.thirst += thirst.per_second * time.delta_secs();
 
         // Thirst is capped at 100.0
         if thirst.thirst >= 100.0 {
@@ -104,7 +104,7 @@ fn move_to_water_source_action_system(
                     trace!("Stepping closer.");
 
                     // How far can we travel during this frame?
-                    let step_size = time.delta_seconds() * move_to.speed;
+                    let step_size = time.delta_secs() * move_to.speed;
                     // Travel towards the water-source position, but make sure to not overstep it.
                     let step = delta.normalize() * step_size.min(distance);
 
@@ -191,7 +191,7 @@ fn drink_action_system(
 
                     // Start reducing the thirst. Alternatively, you could send out some kind of
                     // DrinkFromSource event that indirectly decreases thirst.
-                    thirst.thirst -= drink.per_second * time.delta_seconds();
+                    thirst.thirst -= drink.per_second * time.delta_secs();
 
                     // Once we hit 0 thirst, we stop drinking and report success.
                     if thirst.thirst <= 0.0 {
diff --git a/src/actions.rs b/src/actions.rs
index 1c103fe..47681ad 100644
--- a/src/actions.rs
+++ b/src/actions.rs
@@ -194,7 +194,7 @@ impl ActionBuilder for StepsBuilder {
                     steps: self.steps.clone(),
                     steps_labels: self.steps_labels.clone(),
                 })
-                .push_children(&[child_action]);
+                .add_children(&[child_action]);
         }
     }
 }
@@ -315,7 +315,7 @@ pub fn steps_system(
                         let step_ent = spawn_action(step_builder.as_ref(), &mut cmd, *actor);
                         #[cfg(feature = "trace")]
                         trace!("Spawned next step: {:?}", step_ent);
-                        cmd.entity(seq_ent).push_children(&[step_ent]);
+                        cmd.entity(seq_ent).add_children(&[step_ent]);
                         steps_action.active_ent = Action(step_ent);
                     }
                 }
@@ -396,7 +396,7 @@ impl ActionBuilder for ConcurrentlyBuilder {
             .collect();
         cmd.entity(action)
             .insert(Name::new("Concurrent Action"))
-            .push_children(&children[..])
+            .add_children(&children[..])
             .insert(Concurrently {
                 actions: children.into_iter().map(Action).collect(),
                 action_labels: self.action_labels.clone(),
diff --git a/src/choices.rs b/src/choices.rs
index 425fe8f..e647d65 100644
--- a/src/choices.rs
+++ b/src/choices.rs
@@ -50,7 +50,7 @@ impl ChoiceBuilder {
 
     pub fn build(&self, cmd: &mut Commands, actor: Entity, parent: Entity) -> Choice {
         let scorer_ent = scorers::spawn_scorer(&*self.when, cmd, actor);
-        cmd.entity(parent).push_children(&[scorer_ent]);
+        cmd.entity(parent).add_children(&[scorer_ent]);
         Choice {
             scorer: Scorer(scorer_ent),
             action_label: self.then.label().map(|s| s.into()),
diff --git a/src/scorers.rs b/src/scorers.rs
index 1165aff..a6949f0 100644
--- a/src/scorers.rs
+++ b/src/scorers.rs
@@ -279,7 +279,7 @@ impl ScorerBuilder for AllOrNothingBuilder {
             .collect();
         cmd.entity(scorer)
             .insert(Score::default())
-            .push_children(&scorers[..])
+            .add_children(&scorers[..])
             .insert(Name::new("Scorer"))
             .insert(AllOrNothing {
                 threshold: self.threshold,
@@ -406,7 +406,7 @@ impl ScorerBuilder for SumOfScorersBuilder {
             .map(|scorer| spawn_scorer(&**scorer, cmd, actor))
             .collect();
         cmd.entity(scorer)
-            .push_children(&scorers[..])
+            .add_children(&scorers[..])
             .insert(SumOfScorers {
                 threshold: self.threshold,
                 scorers: scorers.into_iter().map(Scorer).collect(),
@@ -565,7 +565,7 @@ impl ScorerBuilder for ProductOfScorersBuilder {
             .map(|scorer| spawn_scorer(&**scorer, cmd, actor))
             .collect();
         cmd.entity(scorer)
-            .push_children(&scorers[..])
+            .add_children(&scorers[..])
             .insert(ProductOfScorers {
                 threshold: self.threshold,
                 use_compensation: self.use_compensation,
@@ -696,7 +696,7 @@ impl ScorerBuilder for WinningScorerBuilder {
             .map(|scorer| spawn_scorer(&**scorer, cmd, actor))
             .collect();
         cmd.entity(scorer)
-            .push_children(&scorers[..])
+            .add_children(&scorers[..])
             .insert(WinningScorer {
                 threshold: self.threshold,
                 scorers: scorers.into_iter().map(Scorer).collect(),
@@ -805,7 +805,7 @@ impl ScorerBuilder for EvaluatingScorerBuilder {
         let inner_scorer = spawn_scorer(&*self.scorer, cmd, actor);
         let scorers = [inner_scorer];
         cmd.entity(scorer)
-            .push_children(&scorers[..])
+            .add_children(&scorers[..])
             .insert(EvaluatingScorer {
                 evaluator: self.evaluator.clone(),
                 scorer: Scorer(inner_scorer),
@@ -978,7 +978,7 @@ impl ScorerBuilder for MeasuredScorerBuilder {
             .map(|(scorer, _)| spawn_scorer(&**scorer, cmd, actor))
             .collect();
         cmd.entity(scorer)
-            .push_children(&scorers[..])
+            .add_children(&scorers[..])
             .insert(MeasuredScorer {
                 threshold: self.threshold,
                 measure: self.measure.clone(),