Yep, my boys have come up with some creative things to play with including duct tape and grass. Today they spent two hours playing with walnuts they found in the yard. It started with one and I said why don't you search for more. They each found a handful and started making "houses" for them. Then they gave them a bath in my sink with soap and water. I'm glad they are so creative! And we don't have walnut trees so I am sure a squirrel has brought them around!