Last time my sister came for a visit, we drove into the city and signed up for a rock painting class at the craft store. The teacher was a well known artist and I have all of her books at home.
She brought a good supply of river rocks from her home in Missouri, and the store provided the paints and brushes. We only had 2 hours to listen to the short lecture and then roll up our sleeves and paint, but we had a good time and the rocks turned out OK – for amateurs!