Sandboxes are simple to put together and shouldn’t need the services of a professional. Prepare a level space in your yard clear of rocks, tree roots, and other intrusions that might harm the sandbox bottom before installing. After you’ve put the box together, you’ll need to fill it with sand. The manufacturer’s instructions should tell you how many pounds or cubic feet you’ll need. Sandboxes should only be filled with properly labeled play sand, especially for children’s sandboxes; pavement and masonry sand is not acceptable.