Ingenuity and simplicity combine with happy results in the animals, puppets, holiday ornaments and toys that the author of Boxed-in Doll Houses (1971) contrives from empty milk and cream containers. Paper, crayons, soda straws and a little imagination are all you have to add to come up with a jaw-snapping alligator, a water-spouting whale, a kangaroo complete with joey, or a town full of individualized buildings. Snappy drawings, brisk directions, hours of bright ideas, and lots of room for invention.