Matthijs Kok, a product designer from Amsterdam designed the amazing sand castle mold. The mold consists of a rounded frame and multiple molding pieces. Just placing these pieces around the frame based on your sense of style, and putting wet sand into the small bucket formed by the frame and pieces, them packing the sand down tightly, finally removing all molding pieces and the frame, you will get a beautiful sand castle in detail. According to the steps, you can easily build various sand castles on the beach.
Source: Behance