Had to show you.
That rubber band ball started out as o.n.e. rubber band, and now its the size of a small basketball! Determined little man. They are actually cool fun and a brilliant distraction. The last time I had a house full of people over, most of whom were bringing kids, I went up to the newsagents and laid down $20 for as many bags of rubber bands I could get, in all shapes and sizes.
I swear, it was the best night - not one squabble, needy child, or broken vase. They sat outside all night making these things and comparing techniques and aesthetics. Really cool.
Image from The Diversion Project