Neuroscientists believe babies don't dream for the first few years of their life.
When teenagers get up to go to school there ability to concentrate is nowhere to be found. Some students fall asleep in class daily. One in for say they sleep in class. Teens who tend to get the needed amount of sleep or getting A's and Be's in school when teens who do not get enough sleep they are more l ikely to earn lower grades.
Most parents this between 400-750 hours of sleep each child's first year.