Learning Colors

We are teaching Olivia her colors by using balls in a ball pit. At a recent consignment sale I found these balls for a few bucks and filled them in Olivia's pool. Not only does she have fun playing in the ball pit, but we are using this opportunity to learn colors. As of now she can recognize red, blue, yellow and green balls when asked about the colors and she can also say all of these words. Her favorite color ball by far is the purple one.