This here's your basic color wheel. In fact, it's the third edition of the Grumbacher color wheel -- from August of 1977. Grumbacher is an artists' paint manufacturer. It looks like someone used it, too. It has tiny watercolor paint spatters. This is just over nine inches across and is made of a sturdy, plastic-like paper.
I don't think a color wheel like this is going to educate you anywhere near as much as making your own by mixing actual paint. But if you play around with it, you get some nice combinations through the windows. It even tells you how to make gray!