Chimpanzees are true masters when it comes to solving puzzles and using tools.

Ages: 3-8

Chimpanzees are true masters when it comes to solving puzzles and using tools. They build spoon-like rods to scoop out honey or crack open nuts using stones. To prevent hurting their fingers, they knuckle-walk. In doing so, they place only the middle phalanxes of their hands on the ground.