Brushes - For anyone who paints, doesn’t matter if they use oils, acrylics, gouache, watercolor, or any combination, they will always be appreciative receiving paint brushes. If you can find out their favorite brand, then I’d recommend getting them. Watercolor brushes especially, can be prohibitively expensive, so when I can find a brush that does an amazing job and doesn’t cost an arm and a leg, I am happy to share. My current favs are Princeton Velvetouch because they’re versatile, can be used with a variety of mediums, and are quite affordable. Trekell is another brand I really love and I recently bought vegan watercolor brushes from an artist I follow, Polina Bright, and they are so dreamy to use!
Apple Pencil - For any artist with an iPad Pro or any other model that’s compatible with the Apple Pencil, consider getting one. It opens up a whole new world of digital media for your artist and it fits wonderfully in a stocking.