I've noticed over the past year or so that Dollar General has been stepping up the arts & crafts section! The products might not be professional artist quality, but they are affordable & accessible.
They had watercolor sets, tubes of watercolor, acrylic, watercolor pencils, drawing pencils, oil pastels, and a host of other materials! I really am amazed at the variety. Some have voiced their concern about where the products are made and what they may (or may not) contain. We all have to make our own choices about where we spend our money...so be true to yourself in your purchasing prerogative!