In 1947, after development of Kaufmann's invention, Scintilla started producing jigsaws under name "Lesto jigsaw". Puzzle Zone and Stickers are Fun as well as children's jigsaws. In 1985, Bigjigs Toys Ltd started out by selling a large range of wooden jigsaws. There were also other formats including small strip books, pop-up books and jigsaws. Diane Bridgeman demonstrated that jigsaws displayed greater empathy than trads. Licensing already began with Michael Stanfield board games and jigsaws in 1983. Jigsaws liked ingroup and outgroup peers more in work-oriented relationships, but not for coops. Jigsaws felt they could learn more from other students while trads did not. Jigsaws first emerged in the 19th century and employed a treadle to operate the blade. Jigsaws attributed fewer negative traits to Asian- and European-Australians. Trads displayed lower empathy than jigsaws. Competitiveness among jigsaws decreased and increased among trads. Since fretsaws are distinct from jigsaws, the name appears to be a misnomer. Jigsaws increased their ratings in working with peers when compared to their relative control group.