Room 2 is using LittleBits and one of the creations we made was the prank hand shake.  How it works is we have a battery and  then we have a wire leading to the on and off switch.   We have an extender then a button, then we finally have the buzzer that makes the big loud buzz.   We got to put it on.  We put on jumpers to hide the magic.  I went up to someone and I did a handshake.  They had a surprised face for a minute and then I told them about it.  Doing the prank handshake was so much fun.  I hope I am able to use LittleBits again.