First, I filled 20 bags with a variety of pompons, different sizes and colors. I also made a simple vocabulary sheet with stars on it, one for each of the colors. You can download the vocab page for free here: Star color review activity page
During class, each kiddo has a bag of pompons and a vocab sheet. Before we started, we reviewed the color vocabulary and then we were off! I said a color and instructed them to put all the pompons of that color on the appropriate star. Conversation ensued about how many they had and whether they were tiny, medium size or large, which was so cool! Once everyone had their pompons of that color on the sheet, I said another color and so on. It was really great to have kiddos start calling out colors as well!