Primary-grade children delight in using three-dimensional action books. Why not build on this interest to help them to practice their counting and basic mathematics facts? Action books have movable parts and are often called pop-up or pop-out books, lift-the-flap books, or surprise books. Children lift flaps, pull tabs, slide panels, move wheels, or turn pop-up pages to initiate a three-dimensional movement. Mathematics three-dimensional action books offer skill practice in a helpful and exciting format. Children can add apples that slide into baskets, subtract airplanes that disappear behind lift-flap clouds, count pop-up crabs that crawl on the shore, or move hands on a clock to show when it is lunchtime.