Make it @ Your library: Project database for making in libraries. Easily sortable by age range, cost, size of groups, etc.
Library Makers: Another great library blog with tons of awesome project ideas, especially for the little ones.
Instructables : If you want to learn how to do pretty much anything, whether it’s bake a cake or build a roller coaster out of K’nex, you can find it on this website. A great project for students who be to have them document their work and create Instructables on their own projects.