When the students walked in in the morning, I had taped ziplock bags with paint in them to their desks. In groups, they took turns mixing the primary colours to discover what colours they would turn into. We soon discovered that red and yellow mix into orange, blue and yellow mix into green, and blue and red mix into purple.
Once the paint was mixed, they discovered they could draw pictures on them using all sorts of tools: markers, pencils, even race cars! :)
After we finished having fun mixing paint, we mixed paint into little trays and used Q-tips to paint a beautiful picture!!