I pushed the wrong button when I didn't finish my lesson.
On Mouse Paint...
Make a bulletin board that has the mice and equations like One yellow mouse + one red mouse = one orange puddle
et cetera. Put a cat tail at the bottom and say, "Watch Out for the Cat!"
For the culminating actvity,
I make blue ice cubes (berry Koolaid) and put in yellow lemonade to make green.
Make edible playdough (or regular kind) in 2 colors. Give out small balls of each color to mix to make secondary color, like purple or orange.