Human Anatomy Clever Catch provides an excellent way for children to learn about the human body systems and functions. There are 107 facts included. Clever Catch can be used at school in organized classroom activities. It can also be used on the playground or at home. For grades 4 to 8. 24" inflatable ball for dealing with questions relating to the human body. Example questions are: Name the three main parts of the brain. How many chambers are there in the human heart?, What hormone is produced by the adrenal glands?, An answer sheet and play instructions are included.