I always thought the novelty of the sandbox would wear off on these kids but at eight years old and nearly six years old it's still going strong! I put six new bags of sand in it the other day and they spent two straight hours out there digging and building castles. The sandbox is built on a decent sized concrete slab that was here when we moved in. I always thought when the kids got tired of digging in sand we'd take it down and put a hot tub there....but at this rate we won't be getting a hot tub any time soon. Which is fine. Some day though. For now I enjoy going out there and seeing one kid burying the other in sand. What fun they had!