CRAYOLA CRAYONS
Although the basic pack of 24 Crayola crayons does not have crayons named Cyan and Magenta, it does have just enough colors to explore the prism, introduce the concept of a color wheel, or show the colors around the equator of a color globe. These are available in most stores in the US or order 3 boxes from Amazon. If you want to splurge – get the box of 64 or even 96 colors!
Under $5