Everywhere I looked last night I saw people intent on making math. It was glorious!
I mean, just look at these messes!
Just look at the focus!
Just look at all the ideas!
As a finale, I present three views of the interlocking cubes created by one participant. I also hasten to add that while there are lots and lots of materials provided, kids and adults are free to do with the materials what they will. This often leads to unexpected and marvelous personal discoveries and creations, like these: