This is the game I brought there:
It's an augmented reality game, powered by OpenCV and Python. It's kinda a silly, but was a huge success among young kids: A simple platformer where the character is controlled around the screen to collect coins. To reach the coins, the player needs jump over the game platforms.
The catch: There are no platforms defined inside the game, but it detects real world objects as platforms. So, the player constructs its own playfield by grabing objects and placing them at the game screen, at the best positions to pick up the coins