Rudolph Adolph Acher, The American Journal of Psychology (1910)
“ Chief among these are mud pies, cakes, houses, mounds, forts, walks, bridges, dams, animals, people, dishes, farms, villages. The making of mud pies and cakes seems to be limited largely to the girls. The returns show that 158 girls made these but only 4 boys. Houses are built by both boys and girls. They consist of various degrees of complexity from mere heaps of sand with small holes for windows and doors to houses with several rooms, yard with fence around it, flower beds, paths, driveways, barn, pigpen, well, trees or small twigs, even communities and villages are attempted. ”
