Shopping Bag Supply Holders: Instead of throwing away, you can repurpose those really cute and really strong shopping bags for more storage in teen girls room to corral everything from hair ties to markers.
Desk Organization Command Center -- Post-It note holder made with a thick elastic: "wrap it around the Post-It note pad until it is snug but not too tight." Pop up Post-It notes recommended. Love the little metal tin.
Take a bunch of the paper cups with no or less paint, so the light can go through. Mark the base with a little cross and use a razor or knife to puncture the bottom of the cup accordingly. Insert the string lights, hang, light and celebrate.