Developing memory -Recognizing neutral colors

I started to introduce colors to Tommy since he was a baby because of my nature as a graphic designer. He currently recognized de neutral colors: black, white and gray. He also recognizes that Panda bear and zebra are two color animals, black and white. He is developmentally doing many things, even he is not able to verbally express himself, yet. But the fact, he understand what I teach him give me hope. One day he will fluently speak both languages, English and Spanish. Meanwhile, I keep helping him to reach his full potential.