This colorful series of cardboard books for small kids show the various animals of the world, and help kids learn new English words in a fun way!It is said that rainbow is a symbol of good luck, gather all seven books each representing a different color and find yours!Each book of the series has a different topic, animalsPetsFarm animalsForest animalsBirdsSea animalsInsectsWhy series of cardboard books are cool?* Cardboard books are sturdier than regular paper books, making them ideal for small kids who are still learning to handle books properly.* Books with different animals can teach children about the world around them and help them develop basic knowledge and vocabulary.* Cardboard books are lightweight and easy to carry, making them great for on-the-go entertainment or travel.