Here's an article on making them yourself - Made by Joel » Slotted Building Discs
Includes a bunch of templates too.  
Looks like a great Christmas present for the grandgirls......
There's at least a few of these slotted disc sets available on Amazon. Search Google for "slotted disc toy"
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This is a great hobby for the retiree - interesting, time-consuming, rewarding - and about as inexpensive a hobby as you can find.
Shamelessly stolen from a post by rockpaperscissor
Last edited by elliott; 09-07-2016 at 10:55 AM.
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