This extremely cool site came about when the Instructables people teamed up with librarians to search the Instructables site for projects most suited to libraries.
You can narrow your search by age, tools and space needed, cost and time to complete. There are some amazingly creative and cheap projects here. I have my eye on the DIY arrow marquee! OK, so I don't have a table saw at the library, but I plan on expanding my makerspace every year!