Yoyocutters
Chuck writes in –

One of our writers found some nice kits that let you get started making your own yo-yos regardless of your woodworking skill level. The company sells parts, blanks and cutters to make your own, and even a mandrel for turning your own blanks if you own a lathe. I think I’m gonna pick one up.

Toolmonger » Roll Your Own Yo-Yos – Link & more.