For ages 4-8. Isaac is almost three years old and Emma is in elementary school. Emma misses the adoring baby brother Isaac used to be. Now that hes older, hes a pain. Emma used to be able to make Isaac laugh. He used to let her hold him without squirming. But no more. Now Isaac spits out his food and knocks down her blocks when Emma tries to play with him. Sometimes his behaviour is downright embarrassing. Emma thinks Isaac would be more fun if hed hurry up and learn some of the sign language she and her mom are trying to teach him. His slower pace is maddening at times! THE BEST WORST BROTHER is an endearing and realistic look at how a relationship evolves between a typically developing older sister and her younger brother with a developmental disability.