I reorganized my Mario shelf over the weekend. With the Mario collection getting bigger, I moved my Inspector Gadget stuff to another shelf. Same setup, just a different shelf. Now I have 2 shelves for my Mario stuff. The question blocks are held up with push-pins. The brown blocks are from an Amiibo end level display, which also came with a flagpole. I didn't have room for the flagpole so I just added in the blocks for now.