re: Need help with ground under kids fort

I went with a layer of sand, then pavers on top. (I went to Home Depot before checking the thread this am). The area is only 13 square feet, it's got 2-3 foot high walls all around and has a 5 ft ceiling, so it's not like they will be jumping or sliding onto the brick. I'm pleased with the finished product. Thanks for all the input. TD is always the first place I come with questions like these.