 In some strips, he tried to sell "great ideas", and in one earlier strip, he attempted to sell the family car to obtain money for a grenade launcher.In yet another strip, he sells "life" for five cents, where the customer receives nothing in return, which, in Calvin's opinion, is life.The box has also functioned as an alternate secret meeting place for G.R.O.S.S., as the "Box of Secrecy".