Make a marble run with paper plates! Very cool!
Put bolts through holes and twist nut on other side - great for fine motor skills!
How to Build a Cardboard Bridge and the Challenge and Discover link up. We challenge you to build a bridge with your kids and share what you did!
Newspaper Play Structures -- kids can build & re-build them. Throw a sheet overtop for an instant reading nook. :-)
home made shape puzzle... such a simple yet cool idea!