Repetition is good for them. As soon as your child learns the words in a book, he will help you read it. At first, he will fill in a few words and later he will add longer sentences. These are important beginning steps to learning to read. Help children experience the world through all their senses.
Young children learn best by doing.
They have to experience things in order to learn. Give them opportunities every day to smell, hear, see, feel, and taste. Even very young children can memorize facts, but true learning and thinking capacity come, not from rote memorization, but by actively engaged in the world around them. Every day children need opportunities to experiment and explore in a safe environment. Help children develop a questioning mind.