Anything with a small gas engine that you don't need anymore: snowblowers, lawn mowers, rototillers, etc. running or not!!
Solid stock lumber
Do you have access to kiln dried lumber; varying species? We can build cool things from it.
Don't throw out those old aol cd's. I can recycle them into useful things for my classroom!
Watco Danish Oil
We use the natural color oil for finishing all wood projects; this is around $25 a gallon.