I wonder how long it took to make 207 yo-yos?
To wash them I'd probably just soak them in a sink full of soapy water, rinse them and see if that works. Either that or put them in a lingerie bag in the washer if you think the fabric would survive.
You can do so much with them, it's amazing: see what you come up with on Google. I came up with placemats and coverlets but haven't tackled either yet.