So much fun! When Bill suggested we refill our much neglected sandbox, I readily agreed. We took the trailer to a local rock and mulch place and asked for "half a load" of sand. For $16 we got way more sand than needed to fill our sand box. (Enough to fill in a few holes around the yard too.)
I can't remember how much those bags of sand are at the store, but I remember it would have been more than $16 to fill our box. If you don't have a sand box, a cheap plastic swimming pool will do. One year, for my nephews birthday we bought a sunflower shaped pool at Dollar General which now happily serves as a sand box on their back porch!
Finally the key to success of this plan was that the children had to "do the work"!
I know, Bill doesn't look so happy to move the sand, but he sure has been happy building cities, towns and the rock and mulch supply place, ever since!