ConcenTREEtion is a matching and memory card game in the vein of Concentration (also called Memory). The player must simply uncover all of the matching cards with the fewest flips and in the shortest time. It is a simple game to learn, but nonetheless requires a bit of brain power to master.

The Arbor Day Foundation has two versions of the ConcenTREEtion: a 24-card (12-match) challenge game, and a 12-card (6-match) beginner game.