Ninja Kid 3 - The worst ninja ever

Nelson Kramer can't wait for the annual sports day. As a ninja he should be able to win a few gold medals. But when something goes wrong with his grandmother's new invention, his powers and those of his grandmother are switched. While his grandmother suddenly does fast backflips, Nelson is in pain all over and wants a cup of tea for the first time in his life. This is not only a disaster for all competitions, but also for the winners of the sports day, who are kidnapped. How is Nelson supposed to save them without his ninja powers?
The Worst Ninja Ever is the third installment in the hilarious Ninja Kid series by popular Australian children's author and comedian Anh Do.