If you've ever been relaxing on the beach, admiring everyone else's sand castles, and wishing you knew how to build one - well, have we got a treat for you. Building a sand castle really isn't as difficult as it looks, and only requires a few key tools. So, grab your pail and shovel, and get digging. Choose an ideal area for building. Any sandcastle that is worth building well will take at least half a morning or afternoon, so avoid any areas of the beach where there are tides coming in. Alternately, select an area of sand that has been laid aside especially for the purpose of sandcastle building.