However, eventually there will come a time when your mini artist is ready to take on more advanced projects, which means upgrading their art supplies to include the best modeling clay for kids.

Last year, Sawyer Sparks, 23, turned down a $500,000 offer from Hasbro, maker of Play-Doh, to license his patented gluten-free modeling clay, called Soy-Yer Dough (that's blueberry blue ...