Full set includes 26 felt letters, fabric tree, softcover book, and CD audiobook. felt letters are designed to adhere to the fabric tree, and can be easily removed. . Children can follow along with the book or CD, learning the alphabet and having fun along the way'. Fabric tree is 20 inches tall, letters come in various sizes. Constructive Playthings is committed to providing safe, compliant products and a healthy, safe working environment worldwide. We require that all products meet all applicable federal regulations, which we review on a continuous basis. CHICKA CHICKA BOOM BOOM by Bill Martin Jr. and John Archambault, illustrated by Lois Ehlert. Text copyright 1989 by Bill Martin Jr. and John Archambault. Illustrations copyright 1989 by Lois Ehlert. Produced by arrangement with Simon & Schuster Books For Young Readers, an Imprint of Simon & Schuster Children’s Publishing Division