public class Explosion : MonoBehaviour
{
	// Use this for initialization
	public void Explode ( float power )
	{
		foreach( Transform child in transform )
		{
			//child.rigidbody.useGravity = true;

			float explosionForce = power;
			float explosionRadius = 10.0f;
			float upModifier = 0.0f;
			Vector3 explosionPos =  new Vector3( 0, 2, 0 );

			child.rigidbody.AddExplosionForce( explosionForce,
								explosionPos,
								explosionRadius,
								upModifier,
								ForceMode.Impulse );
		}
	}
}