M really likes painting, coloring, and experimenting with paint, so the other day I set up an activity that cost me close to nothing and that turned out really successful.
We made home-made watercolors. We had never tried it before and it was really simple. First, I gave M a dropper full of water and a plastic egg box. She experimented with the dropper a little bit, then accepted my help. We would otherwise have had way too much water in each hole.
We then added a little bit of cinnamon, orange and green food coloring, turmeric, and curry, and we had nice watercolors to paint with!