It's a great site with designs for children's furniture that you can make out of cardboard. And....drumroll please....it's free!
They have three designs that you "fold" out of sturdy 4-mm cardboard. A stool, chair and rocker. I have no idea where to find 4-mm cardboard. That might be the toughest part of this project.
The designs are created in such a way that they can easily support a child's weight, and even that of some adults.
I can't wait to try this. Too bad we just threw out our cardboard!