I bought these for my child before, but they didn't seem very interested, and after subscribing, they were put away in the closet. However, please understand that these are used items that were once in the hands of a child, so there may be folds, minor scratches, etc. Microbial Power Neutrinos and the Universe Shape World The Great History of Dinosaur Discoveries Mars Colonization VS. Deep Sea Cities The Great Color Experiment The Athlete's Body Extreme Weather Survival Poisonous Mushroom Ranking Become the King of Codes The Truth About Viruses