GameObjectの拡張どっこいしょ

GameObjectExtensions

using UnityEngine;
using System.Collections;

public static class GameObjectExtensions
{
	// GameObjectの子にいるGameObjectを名前で取得する
	public static GameObject FindChild (this GameObject parent, string name)
	{
		Transform child =parent.transform.Find(name);

		return child == null ? null : child.gameObject;
	}
	
	// 子供を全員Destroy！KillThemALL!!!（DestroyAllChildrenとかの方がわかりやすいと思います
	public static void KillChildrenAll(this GameObject current)
	{
		foreach ( Transform n in current.transform )
		{
			GameObject.Destroy(n.gameObject);
		}
	}
}