Mondrian Blocks - A challenge for all ages! Play it solo, with friends, or even make a competition out of it! Your brain is just like a muscle, waiting to be exercised and challenged. Open your case, pick a challenge card and place your starter blocks on the board as shown then try to place all of your blocks on the board surrounding the starter blocks. There is only one way to solve the challenge for each card. It's time to make some art, game on! Each travel case contains 88 challenges on 44 double-sided cards and 11 play blocks that are conveniently stored in separate compartments. On the backside of every hard case there is a unique code to register online to register for new challenges too! All four editions contain 88 unique challenges, collect them all!.