I happened to be playing with one when this article popped up in my RSS feed. It's my sons but it's on my desk because I tried repairing the cracked frame with super glue, for about the 5th time. It still works with the cracked frame and the repair didn't take this time because I mindlessly starting playing with it while the glue was still drying. We've had 3 around our house for about 2 weeks and everyone that lives or visits, in age groups from 60's down to 10 months have fidgeted with them almost every time they come across one.