Cardboard and children are a good combination. It's light weight, strong, recyclable and inexpensive. So we were happy to see this Cardboard Armchair by Canadian company Toytoy.
The armchair comes flatpacked with easy instructions for assembly. It comes in red, yellow and blue with a natural cardboard or white background. There's even a little storage area under each chair. You can order directly from Toytoy here for about $20.