These are so cute I just have to tell about my grandson, now 21 years old. When he was around 2 or 3, he loved anything with a battery that he could turn on and play with. We had kept him over the weekend and were on our way to deliver him back to his mon and dad, which was about a two hour drive from our house. He had been doing very good with the potty training so when he announced on the drive home that he needed to use the potty, we pulled over to the side of the highway (no homes around) and set him out so he could proceed taking care of his business. After a minute or so with no result he exclaimed "Won't work - no batteries".