A successful sandbox installation takes planning and forethought. You just can’t dump a pile of sand in your yard and call it a day. You need to take the size of your yard into consideration and where a feasible and safe location will be. The size of the sandbox is up to you. Just make sure it doesn’t take up too much of your yard for your liking and that it’s not too small for your children to enjoy. Use a measuring tape or similar tool to measure out an applicable area and estimate what square footage might work. Anything from 4' x 4' to 6' x 6' is a good place to start. Mark the dimensions of the location with stakes and landscaping twine. If you’re going to have a 6' x 6' box, for example, measure 6' with the measuring tape and push stakes in the ground at each end of the measured distance. Measure another 6' perpendicular to each of the stake points and mark the new ends with stakes. Tie an end of landscaping twine to one of the stakes and then wrap it around each of the four stakes until you have a 6' x 6' square.
Where possible, try to plan your sandbox in an area that receives some shade either by the house, another structure or from trees to keep your children from being exposed to too much UV radiation.
Choose a location that provides easy visibility of your children at play.