I pulled out 3 bottles of paint: Blue, Yellow, and Red. I drew six circles on their special painting paper and wrote the names of six of the rainbow colors in the order the boys yelled out (Green, Yellow, Orange, Red, Purple, Blue...which worked out quite well, I think) and asked if they thought we could make all six of those colors with the 3 colors I had on the table. They said No Way. :) So, we attacked Green first. Green wasn't on the table so we hypothesized which of the primary colors would we be able to mix to get green. Peter guessed Red, black, brown, and blue. Andrew guessed correctly and I dropped a drop of yellow and a drop of blue in the middle of the first circle and we stirred the paint together with our paint brushes. The look of surprise and excitement on their faces as they saw green 'magically' appear was so priceless!! We did that with every color and they absolutely loved it!
We then took our color creating to a different medium: Playdough and food coloring. We separated the dough into six small balls for each boy, I had them make holes in the middle and we dropped the right colors/combinations in to make all the colors of the rainbow. We squished and squashed the playdough to make the colors appear, then rolled them out into long snakes and made beautiful rainbows! What a fun day with colors!