Like shipping pallets, wooden cable spools are another item that is usually found for free on Craigslist. Since cable spools are limited by their shape there are fewer repurposing options, but they make a great coffee table bookcase.
Who would have thought these are sea glass! (phtoto transfer of laser printed photo, transferred with Mod Podge! Time for the beach! found on: art in red wagons: photo transfer on glass