Fidget toys all have a satisfying mechanical action to engage with, and [uhltimate]’s OTF (out the front) “fidget knife” model provides that in spades. The model snaps open and closed thanks to a ...

3D Insider is ad supported and earns money from clicks, commissions from sales, and other ways. Fidget toys caught on in the last decade, most notably when fidget spinners became extremely popular.

[kida] has a highly innovative set of 3D-printable, musical fidget toys that play classic video game tunes. Of course there’s the classic Super Mario ditty, but there’s loads more. How they work is ...