Although I don’t have a particular opinion about either material if the product functions, the new Spirograph unfortunately had several defective wheels that I believe can be traced back to the materials. Wheels 80, 72 and 63 were unfortunately not flat and indeed had such a degree of wobble that they reliably jumped out of the teeth of the …
https://www.amazon.com/Spirograph-01001-S-Deluxe-Design-Set/dp/B009VE38CI