Kaiko have been working on the Hailstorm Fidget for some time now. Modelled off the Pinart tool, this is NEXT LEVEL!  
You can toss it over and over in the hand, 'feather' fingers underneath, shake, tip & even spin. The sound is sooo satisfying and the 37 moving pins gently 'tickle' the fingers & hand. These are hand crafted, with each pin being individually mounted in the overall casing. Small enough for the pocket, its packed with stimming JOY. 

*Not silent so not great for meetings and the classroom but not so loud that its super annoying either. I would describe it as a soft tinkle, kind of like hail on metal, thus its name.  

Made from Stainless Steel and Aluminium, weighing 100grams. Comes in a gorgeous window display tin.  
Not suitable for 3 years and under due to small parts & choking hazard.