Question: My child is 3 years old, but I taught him to count numbers, distinguish colors, he kept forgetting to remember, how can I teach him to remember?
Information from expert iSmartKids: The age of 3-6 years of age is a "golden window" period to stimulate a child's brain function to develop during brain growth. If implementing early education for children will help exploit the great potential of the child's brain. We all know that having a good memory will help children do things easier and have a higher chance of success, so memory training, helping them remember effectively is very important.

Learning memory early will help children optimize their intellectual potential in the future
Parents are often impatient and inconsistent in teaching their children. Parents often teach children too many names for many things such as colors, numbers, letters, ... Therefore, children can hardly remember immediately and even children get confused. Parents need to be consistent in using words when speaking with their children, using short, simple, loud and clear sentences. Children can usually quickly memorize words when they hear or say once, but then they can forget. Parents need to be patient to help children remember, by repeating words and activities. Parents can refer to the method of teaching children to increase memory capacity according to Montessori Education Method : 3-step lessons from the book "Applying Montessori at home".
 
Format: Parents produce 3 objects, say each item's name once.
Confirm: Bring these 3 objects in front of your child and ask them to point to the correct one when we mention their name.
Remember: Ask your child to say the name of each object and repeat.
For example:
 
Mother introduced: This is red, this is white, this is blue.
Mother asked: Where is red? Where's the white? Where's the green?
Mother asked: What color is this?
Parents should apply this method and will see children increase memory capacity.