In general, adults need 8 hours per night and children at the age of 5 require 10 hours, decreasing gradually to 8 hours as they become late teenagers. Children who are sleep deprived often show signs of bad behaviour, irritability and cannot concentrate and perform well at school. In particular they seem to have less ability to quietly concentrate on a task and often are over or hyperactive. Restoring their normal sleep pattern can have huge benefits for family life.