Prehistoric giants, fearsome predators, even a wide-eyed owl—these 3D wooden puzzles offer a satisfying way to exercise your powers of observation, concentration, and problem solving, as well as fine motor skills. Each has about 40 or 50 laser-cut plywood pieces; carefully press them out, match them to the detailed instructional drawings, and slot them into place. The finished models measure about 5½" to 6½" long.