Ideias, ideias, ideias...
How to DIY Book Organizer from Recycled Plastic Bottles | iCreativeIdeas.com Like Us on Facebook ==> https://www.facebook.com/icreativeideas
25 Free Ways to Organize Your Home - Kids Activities Blog
Recycled craft: DIY desk organizer. I would also put something on the inside so that that it doesn't look like cardboard.
Ideias, ideias, ideias...:
DIY Caddy for pens/papers
15 school homework organization tips to make your life easier.
Repurposed plastic coffee containers
DIY Organization for Teen's Room