spray paint measuring tape and keep track of kids heights at different ages. Takes up no space and can move with you. I would paint the back side to mark so you can still see their height without having to remeasure your measuring tape.
A mother saved all the things she found in her son's pockets when doing the laundry. She gave him this lamp with all things found as a wedding gift ~ such an AWESOME idea! (my son would need a much bigger lamp!
Pillow Fort Construction Kit Disguised as a Foot Stool