I wonder if I could convince Adam to build us something like this for the backyard this summer... but it would need a cover. And I think I would fill it with just dirt and maybe we could enclose the sides with something cheap like plastic trellis and put a water table in there. Messy but super fun!
I like this because I would hang it in my house, auction project from my kids or not. I like the idea of the kids decorating the little wooden pieces and putting them together to make something.