Your toddler will love this LeapFrog LeapReader Junior Toddler Milestones Book Set. Each of the 4 sturdy board books features Leap and other beloved LeapFrog characters, sing-along songs and an interactive story that helps toddlers approach big milestones. The books include: Leaps New Potty, Count Leap to Sleep!, How Are You Feeling and Things to Do with Baby. Toddlers can listen and interact with the illustrations to help them understand and cope with each milestone. Use the LeapFrog Tag Junior Reading System (sold separately) to bring these books to life.