Hi! 

I would like to use a battery operated disco ball ontop of my cake. The battery part of it kind of looks like a screw in light bulb. The switch to turn it on is in that bulb part too. (It flashes colored lights when on). 

My question is, how can I put the ball on the cake, while the customer is still able to acces the switch to turn it on before the party? I could cut a little hole in top of cake and rest the ball in there, but i am worried that it wont be sturdy enough and the ball will easily fall out. 

Any tips or ideas? 

Thanks!