Thank you
It's a useless box in that when you turn on the switch on the outside of the box, it turns itself off again. They can be very simple and only go through the cycle once, or they can have several cycles programmed in, doing different actions. They can also be made with more than one switch.
If you look up useless box on YouTube, you'll see how it works. When the switch on the box is turned on, the lid opens and the doll head pops up. Then a hand comes out to turn off the switch. It then returns to the inside of the box and, depending on the programming, a new and different cycle will operate when the switch is turned on again.
A 9 volt battery is what I used to use in my R/C airplanes, worked just fine.
I don't yet know how to attach a pic of the circuit diagram but this URL, DIY Useless Box with Arduino - YouTube is something like what I want, and it has a link for the circuit at Angle Fire.