Here is a toy that you may remember if you grew up in the Eighties. Rubber Poppers
It was a simple concept. Turn the rubber popper inside out and wait for it to ping into the air.
Parents everywhere would exclaim “I’ll buy you one, but do not put it in your mouth”!
This retro toy from the late eighties though had to be tried in all sorts of circumstances. What happens when it pops in water? How far can it jump off the stairs. Good point, what does happen when it pops in your mouth?
Such a simple toy but one to remember to your grandchildren. I bet health and safety has now banned them – shame.