The interactive game in the next Caribou Contest (on Wednesday January 18) is Chomp. This is a game that is simple to play, but without practice, can be difficult to win! Here is a link to the Caribou webpage where you can learn about Chomp and practice playing:
When starting out, it is a good idea to figure out positions on the board from which there is no hope of winning, and then try to never give your opponent a board that is one step away from these losing positions.
Here is a "cheat sheet" that shows some losing positions. (Note that for the Caribou Contest, the minimum board dimension is 4 x 4.)