(4'x 2"x 7") 2015
This droll diversion is sure to amuse! It is a scientific experiment gone horribly wrong, it was originally an attempt at perpetual motion . . . it didn't really work.
It has to do with the weight of the balloons against the perkiness of the spring. You add a ball thingy with a hole in it to a copper pipe and zammy, whammy, poof! Hours of fun.