Even more challenges to train the brain with KEVA planks! Deluxe Brain Builders combines 75 KEVA planks and 40 puzzle cards with a 2-D challenge shown from different angles on one side and its 3D solution on the other. Difficulty increases from beginner to master. As each build becomes more challenging, patience and confidence is gained through trial and error. Also includes 8 inspirational design cards with building tips to foster creativity. From snowmobiles and space rovers to hammerhead sharks and bridges, you will be amazed what your brain will build!