Students need to be able to match a shade of colour as well as know what happens when white or black are mixed with a colour, so this is the activity I use to achieve this outcome. I give the students red, white, and black paint and tell them they need to make the heart pink, and the elephant gray. Students then mix paint to match my colours. The example on the right is my sample. I think the student sample is better than mine! I put the picture up on the SMARTboard for students to see what they needed to match.