Let's talk about classifying as it relates to reading. Think about the things your child must be able to recognize to be able know one letter from another. Your child must classify by shape. Shape is the difference between most letters. Your child must classify shapes that face the same way.
Direction identifies a b or a d , a p or a q .
Your child must classify shapes that have the same rotation. Rotation identifies a b or a q , a d or a p , a Z or an N . As your child learns to put away his toys, he will learn to identify every kind of characteristic, big and little, yellow and red, rough and smooth. He will begin to make sense of his world while he is learning to be a productive member of the family. You will spend the time necessary to develop this good habit because you know how important it is.