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One part bicycle wheel, couple of parts scrap wood, four small screws, one big washer...that's it! The assembly takes standard power hand tools (bench tools would be even better) and some wrenches and such. The whole project took 30 minutes tops (I wasn't keeping track really), but it's presented here -- through the magic of really fastness -- in under 10 minutes.
Please let me know if you have any questions, because it may not be as clear as I think it is!