Hi Ana Chris Burt, Belmont NSW Australia
Well, was inspired from your plans on sand pits, so I made a custom one for my first Grandson Brax, it's around 2 meters square. With larger seats etc., was made completely out of recycled pine timber pallets. used waterproof glue, stainless screws and hinges as we live in Belmont NSW which we have lake Macquarie one side ocean on the other so it a battle with salt air. Finished it with a marine clear lacquer. Still lots to do like a pool fence keeps the dogs out and a shade over it. Love your site has great ideas and projects.