https://www.etsy.com/market/wood_gears

https://www.etsy.com/market/wood_gears

http://www.illeccio.com/page.php?lang=en&product_id=46

http://blossomforchildren.co.uk/toys-books/46-wooden-spinning-gears-and-cogs.html

http://www.ebay.co.uk/itm/New-Wooden-Spinning-Gears-Cogs-Baby-Play-Activity-Puzzle-Wood-Toy-Set-/380663410411

http://www.vigatoys.com/Others_57_en.html

http://www.hasbro.com/search/_/Ntt-SPIROGRAPH?Ntk=All&Ntx=mode+matchallpartial 

https://www.youtube.com/results?search_query=Spirograph 

http://lesliefandrich.com/articles/2011/5/18/inspired-by-a-spirograph.html