Painting with herbs
You can either buy some herbs from the supermarket or just pick some from the garden.
Bunch them up like a paintbrush and tie with a rubber band or just dip them in paint and roll them across the paper!
This is a marvellous sensory activity, great to smell, great to touch and great for encouraging fine motor skills as the herbs are easier to grasp and pick up than a regular paintbrush. They're also easy to come across in supermarkets if you don't have any in your garden, or if you don't have a garden.