3 years & up. Interactive reading just became even more engaging with these Chicka, Chicka Books and Story Props for Interactive Read Alongs. This set of props corresponds with the books Chicka Chicka Boom Boom and Chicka Chicka 1, 2, 3. Your children will love placing the letters and numbers up the coconut tree along with the story. This set of props promotes literacy, early math skills, and interactive reading. Set includes a 20" high fabric tree with 19 numbers, 26 letters, one hardback, and one paperback book.