What a fun game! Make two dice: one with numbers, and one with colors. Roll the dice, then use dot stamps to make that number of dots in that color on your paper. :} Then, I'd add counting the number of each color of dots to the end of the game.
Counting caterpillar with printable numbers cards is a great addition to any busy bag collection. This printable numbers set features number recognition as well as word reinforcement and color matching. Great for toddler fine motor skills too!