Sphere shooting squares consist of two blocks and an actual sphere. The actual block is made of metal, and has a hole on the top. The two blocks are usually positioned in a wall, usually in a vertical or horizontal line. They must always be facing each other in order to exchange spheres.
The main and only attack for sphere shooting squares is for one block to fire bright spheres at another block, and for the receiving block to catch the spheres. The sphere will instantly kill Zapo on contact, and cannot be passed without being folded it with a fault line. The spheres are shot out of one block, and received in the other.