I don't usually post anything about kids toys, but my son discovered a new toy last weekend and persuaded his father to buy it for him. Very cheap, made of plastic and cost less than $2 from the local Dollar store.
Basically its just a throwing ball, but when its thrown, it turns inside out. Its made to open up by wind resistance, and then the surface slides so that the inside becomes the outside. Absolutely fascinating.
Anyway, I have never seen these before. Does anyone know what they are called and who invented them?