Although I marked used this kit is super clean and free of any bad odors. It is complete, the only thing is the paper cover is torn and taped up, see pictures. Meant for ages 3+ for hours of fun and learning. Colorful pictures will keep anyone interested. Anyone who is a visual learner would benefit from this cool complex inner-workings of the human body, children and adults. These pre-cut felt pieces are washable, a plus and a must for children. Please see all pictures for more details and thank you for considering.