He absolutely loves to use huge quantities of paint, especially when I give him free reign with the paint bottles.
After a time, squirting paint onto the paper wasn't satisfying enough so he moved to painting the driveway. When I suggested he should paint on paper, he replied, "But I'm making ART!" I cannot argue with that. We then took the puddles of paint everywhere and made prints onto paper. For a final step, he was very pleased to drive a scooter through the whole paint field and make rainbow tracks.
We are now completely out of paint in our house!