It seems that the friendly chipmunks that live on my porch, or at least frolic there, were getting too fat and having trouble getting into the Habitrail that I made. (Check an earlier post). So, I made a box out of hardware cloth to hold peanuts. Since they can see and smell them, but can't get in ,they get frantic and do get some exercise trying to get to them. This puzzle box is fun to watch and no chipmunks were hurt in this video process. I did give them some peanuts after the fun. Aw nuts!