A diver directly recruits his audience to explore the salty sea. Closed, the shaped cover follows the curve of the diver's helmet; open, it evokes goggles through which readers can explore the deep. A variety of underwater creatures are revealed through lifting flaps; brief rhyming text on the undersides of the flaps provides a little informational heft. These rhymes are not distinguished by their lyricism, alas. "Jellyfish are pretty-- / some glow in the dark. / But don't swim too close-- / their sting leaves a mark." The simply drawn creatures are not depicted to scale. The seahorse dominates its page, while the toothy shark appears shorter than the sea turtle. Two-toned blue backgrounds evoke waves. Space Walk uses an identical format to survey the planets (all eight of them) and is equally superficial. The sparkly cover and less-than-exciting interactive elements fail to fully convey the majesty of the watery deep. (Board book. 2-3)