diff --git a/spatial/wit/wired-gltf/deps/wired-physics b/spatial/wit/wired-gltf/deps/wired-physics
new file mode 120000
index 0000000..8caa253
--- /dev/null
+++ b/spatial/wit/wired-gltf/deps/wired-physics
@@ -0,0 +1 @@
+../../wired-physics/
\ No newline at end of file
diff --git a/spatial/wit/wired-gltf/world.wit b/spatial/wit/wired-gltf/world.wit
index 817b4ae..d62b947 100644
--- a/spatial/wit/wired-gltf/world.wit
+++ b/spatial/wit/wired-gltf/world.wit
@@ -66,6 +66,7 @@ interface mesh {
 interface node {
   use mesh.{mesh};
   use wired:math/types.{transform};
+  use wired:physics/types.{collider, rigid-body};
 
   /// A reference to a node.
   resource node {
@@ -85,6 +86,12 @@ interface node {
 
     mesh: func() -> option<mesh>;
     set-mesh: func(value: option<borrow<mesh>>);
+
+    collider: func() -> option<collider>;
+    set-collider: func(value: option<borrow<collider>>);
+
+    rigid-body: func() -> option<rigid-body>;
+    set-rigid-body: func(value: option<borrow<rigid-body>>);
   }
 
   list-nodes: func() -> list<node>;
diff --git a/spatial/wit/wired-input/deps/wired-physics b/spatial/wit/wired-input/deps/wired-physics
new file mode 120000
index 0000000..8caa253
--- /dev/null
+++ b/spatial/wit/wired-input/deps/wired-physics
@@ -0,0 +1 @@
+../../wired-physics/
\ No newline at end of file
diff --git a/spatial/wit/wired-physics/deps/wired-math b/spatial/wit/wired-physics/deps/wired-math
new file mode 120000
index 0000000..967f496
--- /dev/null
+++ b/spatial/wit/wired-physics/deps/wired-math
@@ -0,0 +1 @@
+../../wired-math/
\ No newline at end of file
diff --git a/spatial/wit/wired-physics/world.wit b/spatial/wit/wired-physics/world.wit
new file mode 100644
index 0000000..64cd585
--- /dev/null
+++ b/spatial/wit/wired-physics/world.wit
@@ -0,0 +1,47 @@
+package wired:physics;
+
+world host {
+  import types;
+}
+
+interface types {
+  use wired:math/types.{vec3};
+
+  resource collider {
+    constructor(shape: shape);
+
+    density: func() -> f32;
+    set-density: func(value: f32);
+  }
+
+  variant shape {
+    cuboid(cuboid),
+    sphere(sphere),
+  }
+
+  record cuboid {
+    x-len: f32,
+    y-len: f32,
+    z-len: f32,
+  }
+
+  record sphere {
+    radius: f32
+  }
+
+  resource rigid-body {
+    constructor(rigid-body-type: rigid-body-type);
+
+    angvel: func() -> vec3;
+    set-angvel: func(value: vec3);
+
+    linvel: func() -> vec3;
+    set-linvel: func(value: vec3);
+  }
+
+  enum rigid-body-type {
+    dynamic,
+    fixed,
+    kinematic,
+  }
+}