Here is an amazing robot that can create amazing patterns in the sand. SANDSARA moves a sphere in the sand to get it done. It can move the sphere to the very edge to draw large paths. You can choose from over 100 patterns. The companion iOS/Android app lets you download new patterns.
SANDSARA comes with RGB lighting and tempered glass cover add-ons, so you can get an even more mesmerizing experience and keep your pets or kids away from your sand art. This project is getting funded on Kickstarter. You can find out more about it here.