Matthew Varas made an impressive GIF Playing LED top hat.
The project was inspired by a robotics competition. Matthew is a mentor for the team an wanted show how to have some fun with engineering. The hat uses 4 flexible 16×16 RGB LED panels, a Teensy 3.6, other miscellaneous parts, and LOTS of hot glue.
This imugr gallery has a pretty good write up on the assembly process.
Code for the project is available on GitHub.