Best Art Supplies: Blick Art Materials
Sure, little Griselda and Hubert might still be in the finger-based phase of their watercolor art careers, but sometimes it just makes sense to get serious about the art supplies early on. Blick Art Materials (formerly known as Dick Blick Art Materials, based in Illinois since 1911) has one retail store in Ohio, and Columbus has it (but you may actually know them best from their huge mail-order business).
Parents appreciate the bulk-based prices and the huge selection. And when Griselda and Hubert are ready to make the jump to oil paints and canvases, you'll know just where to go.
Runners-up: Lakeshore Learning Materials, United Art & Education