Crayola has cornered the market on colors. The crayon maker's 10 most popular colors include blue, red, violet, green, carnation pink, black, turquoise blue, blue green, periwinkle, and magenta. It produces about 3 billion crayons a year, as well as other Crayola art products for children, such as markers and craft and activity kits. Crayola also makes Silly Putty, the iconic silicone putty with utility; and inkTank pens and markers for adults. The firm's products are packaged in many languages and sold worldwide. Edwin Binney and C. Harold Smith sold their first Crayola crayons in 1903, when a box of eight cost a nickel. Crayola is a subsidiary of Hallmark Cards.