Eaton uses them all the time whenever he goes. It's really nice to see him playing with Flextangles. I didn't know this stuff when I was little so I'm glad my boy can experience fun with shapes.
I was the one doing all the gluing and taping but still it was fun for all of us to use them.
I couldn't make any Flextangle using only glue. That didn't quite work so I used tape to connect all the edges. It looks so nice and neat though on the explanatory video .
Here is official Youtube video showing Flextangles: