Hyperactive symptoms are present when a child, without any apparent reason, is more active than other children his or her age during sleep time, meals, homework, games, and all other activities. A child who moves constantly, becomes frustrated easily, is very impulsive, and constantly blames others for problems is also demonstrating signs of hyperactivity. According to many experts, the child is having difficulty controlling his or her behaviour because the part of the brain responsible for self-control is working at a slower pace.