This is a skeletal model. It glows faintly in the dark due to its phosphorescent properties. Some of the joints are movable. Please check the images for the size. It is being sold as junk because it does not have a base. You will need to use something like Oyumaru-kun plasticine to stabilize it. I think it can also be used as an item for osteopathic clinics, bone-setting clinics, chiropractic clinics, massage parlors, etc.