Stake out and excavate the play area according to the dimensions shown in the illustration. Border the area with 1" x 4" edging. Lay a 1" to 2" gravel base to improve drainage; this is especially important in damp locales. Use 5/8" exterior-grade plywood and 2" x 2" wood to construct the sandbox frame according to the dimensions shown in the illustration. Border the frame with 1" x 3" trim. Fill the sandbox with QUIKRETE® Play Sand. Spread a 1" to 2" layer of QUIKRETE® All-Purpose Sand over the ground surrounding the sandbox. Tamp the surface smooth, then lay the bricks in rowlock fashion over the entire area. Sweep QUIKRETE® All-Purpose Sand into the cracks between the bricks. After removing any excess sand from the surface, wet it down with a very fine spray; be careful not to allow any pools of water to form. Use sand box calculator from images to determine how much sand you want for your sand box.