ELI5: Explain Like I'm 5

Dynamical billiards

Dynamical billiards is like a game of pool - only the table is curved and bouncy! A dynamical billiards table is made of special materials that make the walls bend and move. When you hit a ball on the table, it will bounce off the walls and eventually it will come to rest in a certain spot. The goal of the game is to make sure you hit the balls such that they end up where you want them to be! It can be very challenging because you have to remember how the walls bend and change the ball's trajectory when it hits a wall. You can even make your own dynamical billiards tables if you want to practice the game. The goal is to get better at calculating where the balls will end up after they bounce, so you can figure out the best way to get the balls where you want them!