The John N. Hansen Human Eyeball Anatomy Model, 3.5 is a new learning concept with a 32-pc, 4D puzzle of the human eye. Not only will your child enjoy putting the puzzle together and taking it apart over and over again, but theyre going to learn so much about anatomy at the same time. This wonderful learning toy features fine detailed sculpturing and hand painted parts that are up to medical educational quality. They eye puzzle is also very durable and designed to be played with repeatedly. All learning toys should be this engaging and informative. Includes assembly guide and stand. 8 years and up.