Dr Mike's Math Games for Kids

If you want to, you can buy spirograph products from Amazon.com. I would strongly recommend reading the product reviews before you buy. I had a look, and found (to my surprise) that the main spirograph set produced by Hasbro (Spirograph Deluxe) is attracting bad reviews.

When I checked, the best ones (according to the reviews) seemed to be the Spiral Draw Book and the Doodle Doug Toy.

Of course, if you want a free spirograph, you can use the online spirograph applet on this website. Read also how spirographs can help kids learn math...