Kinetic Sand Sticks
It’s made from 98% sand, with some proprietary coating that gives it its special properties. You can mold it, play with it, make all kinds of shapes, and start over at will. It’s just a toy (similar to the ill fated Buckyballs) that will probably lose its appeal after some time, but at $15 for a 2.2 lbs bag, it’s safely in impulse purchase territory.
