Have you seen these on Pinterest? It seems like a lot of people use them as kid book shelves. That was my original plan when I bought four of them. However, before they got mounted in E's room, I decided that I needed some in my office. They're perfect for all my little crafty things.
The big plastic container is some kind of sewing container. Or, at least that's where I found it-- with the sewing stuff. The three Erlenmeyer flasks were a donation from a science teacher friend, and the jar full of washi tape was originally a jar of dried chipped beef.