Matt Mets has a Kickstarter for something he calls BlinkyTile.
It’s a fun little set of pentagonal LED circuit board tiles that you can solder together to make
geometric shapes, and then program to make dazzling light shows. It’s
unique because the LEDs are all connected in parallel, but each one has
it’s own address, so you can make any kind of structural topology and
still control each light individually. I would of course appreciate any
attention I could get for it!