How to Build a DIY Sandbox | Lowe's
Sep 25, 2020· Usually called play sand, prepackaged, multipurpose sand is typically washed river sand, which is smooth and clean. A 50-pound bag takes up about 1/2 of a cubic foot. You don't need sand all the way to the top, so 64 bags will be enough to fill an 8-foot-by-8-foot sandbox about halfway for an ideal play space.