Blackbox is a classic puzzle and logic game. The idea is that you have a black box inside which there are 4 (or so) atoms hidden in secret locations, and you want to find out where they are.

You can't look into the box, but you can shoot "light beams" into it. The light beams will interact with the atoms (being absorbed, bent or reflected), and so by observing what happens to the light beams, you will eventually be able to work out where the atoms are.