$15 materials fee is for the use of palettes, black gesso, liquid clear, brush cleaning system, easels, and additional oil paint colors not listed. Additional materials required are the Bob Ross Master Paint set plus additional colors of yellow ochre, Indian yellow and dark sienna. Plus 3 16x20 canvases. All PAINTS, BRUSHES, LIQUID WHITE AND PALETTE KNIFE MUST BE BOB ROSS. Bring paper towels and baby wipes. Approximate total cost is $99 or you can rent the materials from the instructor for $35 per class. You may purchase supplies online, at a local art store, or get a 20% percent discount at Create and Take Art Center.