Toby and his identical twin brother Booh were adopted when they were tiny babies. They look so alike that sometimes people can\'t tell them apart. But there is one very big difference between them. Booh is always getting into trouble: upsetting other children, fidgeting in class and losing his temper. And as he gets older his behaviour just seems to get worse. What is wrong with Booh? This story about Attention Deficit Hyperactivity Disorder will be helpful for any child aged seven to 11 who finds it difficult to stay still or pay attention.