Think you can build a mean sandcastle? This robot arm will beat you at it. Created by architects Petr Novikov, Inder Shergill and Anna Kulik, the Stone Spray robot features a nozzle on the end of a highly articulated arm that sprays a mix of sand, water, and a binding agent to ensure that its creations can't be destroyed that easily when the tide rolls in.

Check it out after the break:

[Stone Spray Project via designboom]