Waboba goes urban - fountains

Waboba is a marketing con in that you are made to think that it is the ONLY type of ball that can bounce on water.
That is totally misleading

Barnes Wallis, inventor of the bouncing bomb used glass marbles, golf balls, all sorts of balls and got them to bounce on water.
They got steel bombs weighing 3 tons to bounce on water
Any ball will bounce on water . It's hard to find a sports ball that won't bounce on water.

Check out steel spheres bouncing on water :
watch?v=o3ohMEZ-d3I

What`s the difference between the wboba ball and the waboba extreme ball?