Wireless Battery Interrupter

Hi–

I’m looking for components to make a generic wireless battery interrupter. Pretty much this: http://www.smasupport.com/making_a_swit … ed_toy.htm except wireless. On the transmitting end i’m looking for something that I can plug a switch into. On the receiving end I am receiving end i’m looking for a very small component that I could connect to a battery interrupter and velcro to a stuffed animal.

Maybe somehow use Bluetooth?

Any help would be much appreciated!

thanks