What a brilliant idea. This is a superb design and something I hope to build in the summer.
I saw one of these once designed for children, it was much smaller but I thought the idea was really cool, so I figured I would try my hand at a DIY adult size version! The concept is based around the toys where you stick your hand or some other object up against the pins, and it retains the shape of that object. But this version is a much larger size and made of wood. The pins become perfect shelves, with an endless array of configuration options! Best of all, there are pins on both sides, so you can use both sides for shelving! And it’s tons of fun to play with, reconfigure for storage or just make cool patterns on! The pins move easily, and the options are endless!!