The Magic Tree House Kids Set 1-16 by Mary Pope Osborne is a collection of illustrated paperback novels that follows a brother and sister as they travel through time and space using a magical tree house. This set includes 16 books from the Magic Tree House series, with each book focusing on themes such as school, boys' interests, and Magic. Perfect for children ages 4-12, these books offer a wonderful mix of fantasy and adventure that is sure to captivate young readers. The set also includes two hardcover books and one Merlin Mission book, making it a comprehensive collection for any young fan of the series.