[Home](./index.md) > [server](./server.md) > [RigidBody](./server.rigidbody.md) > [createAndAddChildCollider](./server.rigidbody.createandaddchildcollider.md) ## RigidBody.createAndAddChildCollider() method Creates and adds a child collider to the rigid body for the simulation it belongs to. **Signature:** ```typescript createAndAddChildCollider(colliderOptions: ColliderOptions): Collider | null; ``` ## Parameters

Parameter	Type	Description
colliderOptions	[ColliderOptions](./server.collideroptions.md)	The options for the child collider to add.

**Returns:** [Collider](./server.collider.md) \| null The child collider that was added to the rigid body, or null if failed. ## Remarks If the rigid body is not simulated, the collider will be added to the rigid body as a pending child collider and also simulated when the rigid body is simulated.