Originally I would have given these 5 stars but now Neliblu makes them from an inferior plastic compound. This is still one of my favorite ways to fidget. I've been making/using fidgets for myself, teenage students and sons (I'm 58 mom) for 35 years. I wish they would use higher quality materials again, even if I had to pay more. The current model is easier to disassemble, which sometimes annoys teenagers a bit. Toysmith Wacky Tracks are higher quality and worthy of 5 stars.
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