The brain is responsible for keeping all our memories alive as long as we live. Its formation begins before a child is born and after birth, it begins to gradually develop. In this stage a child is eager to learn speech, walking and other activities as they grow.
Brain cells seem to start developing rapidly during infancy compared to adolescence or any other critical stage in life. For this reason, the photographic memory of a child is required to capture so much information for them to keep up with their development. Therefore, everything the child hears or sees is stored up in the temporary memory.
Children keep learning new things everyday hence easily forget the simple things you tell them. For instance, you can send a child to a shop nearby and before getting to that particular place, they forget. Simple things such as vehicles on the way can easily destruct them causing them to forget what you sent them to do. A teacher in school needs to repeat the same concept for hours before children can grasp only because their permanent memory is hard to trigger. Parents can teach their children how to master things by insisting on key issues until their children have understood.