Teenagers do crazy things. They take more risks. Some cause injuries. A study of chimpanzees may explain risky behaviour in children. Researchers studied 100 chimpanzees in Uganda. The researchers looked at how the chimps moved through trees. The youngest chimps did more dangerous things.

Children and young chimpanzees take risks. However, parents stop children from doing risky things. Teenagers have more freedom. They want to try risky things. Researchers want children to play more in parks. This will help children to develop motor skills. It will also make them stronger.