Snaps!...we had these & would throw them onto the ground to make them SNAP! We also used to have these Snaps with strings on both ends...called Burgular Alarms...& we would tape or tie them to the door frame & door in a doorway & when my brother would open the door, it would SNAP! & he would JUMP! ;)
Via Ashley Kathryn
Also on these boards
on the playground was where I spent most of my days....