This is a flattener designed for the Hack Pack Box #4: Sand Garden. It is a circular container filled with sand, with a magnetic ball moving around to make patterns. One of the problems is that it is really hard to get all the sand evenly spread out and level for it to look great. But this flattener I designed solves this problem. Just push it down on top of the sand, and it will spread it out nicely so you don't get frustrated trying to do it by hand.