I recently made homemade paint with Pokeweed, the color of Pokeweed Ink is amazingly beautiful, but L cannot paint with it because it's toxic. This inspired me to let him make his own paint with edible berries. When he gets older we can experiment with this activity a bit, but for now we kept it super simple.
I let L smash some strawberries, blueberries, and blackberries.
I added a little cornstarch and water to thicken it up a bit.
Then I let him go at it!