Materials
Red tempera paint
Yellow tempera paint
Blue tempera paint
Gallon size Ziploc bag
Duct tape
Directions
Place a glob of red tempera paint, a glob of blue paint, and a glob of yellow tempera paint inside the Ziploc bag. Zip the bag closed and reinforce with clear duct tape. Invite your child to use his fingers to mix the three colors together. Observe the new colors that are made as yellow mixes with blue, red mixes with yellow, and blue mixes with red.