Remember the good ol’ days when your parents took you into a non-airconditioned car and drove you to the beach where, after hours of finding a parking spot, you would try to create epic sand castles? Calvin Siebert never stopped making them, and is in fact a brilliant sand-artist (if that is even a word). With just a few plastic spatulas from the DIY store he makes beautiful geometric formations in just one or two days time. Want to have a go at these yourself? Try cheating by mixing sand with corn flour and water, this makes it more easy to manage.