The area for the sandbox started out as an old play area, with a worn out play structure on what used to be wood chips--now a nasty weed patch, 28 feet long by 14 feet wide.
We hired a guy to come and dig out the weeds, wood chips, and about 1 1/2 feet of dirt to make way for the sand. We also moved the play structure.
We bought 15 tons of cyclone sand, which we had dumped onto our driveway. (The sand was only $10 a ton!) And, with the help of several family members, we filled up the sandbox using shovels and wheelbarrows. (Big job!)
The kids love the sandbox. At least someone plays in it every day, and you can fit a ton of kids in there. (Notice that I even put in a water fountain. The pipe and the base were there when we moved in. I added the fixture.)