TY - BOOK AU - Anno,Mitsumasa TI - Topsy-turvies: pictures to stretch the imagination AV - PZ7.A5875 To U1 - [793.7] PY - 1970///] CY - New York PB - Walker/Weatherhill KW - Picture books KW - Optical illusions N2 - Optical illusions form structures in which curious little men can go up stairs to get to a lower place, hang pictures on the ceiling, and walk on walls ER -