Simple and challenging at the same time. **For 1 player, but could be multi-player if you see who can do it in the shortest time.  There are nine (9) small cards, and player must assemble all nine (9) cards, in a square, with each animal having the CORRECT front and back. There are only two solutions!! See photos...Pictures 3 & 4 show an incorrect solution, while pictures 5 & 6 show a correct connection. Lots of laughs at some of the funny combinations you can come up with.
The manufacturer states that "matching inspires thought and problem solving."