"Pop-up Peekaboo: Under the Sea" by DK is a delightful children's board book that offers a surprise under every flap. Published by Dorling Kindersley Publishing, this 2018 release is part of the popular Pop-Up Peekaboo! series. With a focus on animals / marine life, social topics / friendship, and nature & the natural world, this interactive book is sure to engage young readers. The pop-up feature adds an exciting element to the storytelling, making it a fun and educational experience for children.