Here is my way of introducing the children to colour mixing. With this simple project, the students learn how to create their secondary colours by using the primary colours. For preschool up to Grade 2. You will need liquid tempera paint, white cardboard, and black wax crayons or felts. I drew some examples of eyes and mouths for the younger students. They can be inspired by my examples or just glue them on. Bring some sunshine into your classroom!