We believe that visualizing nature's structures is good for students of all ages, but some of the parts are small and magnetic and should be kept away from young children. The Zometool models help us understand structures in nature. Children as young as 10 years of age are introduced to atoms and molecules in schools. Although even younger children may be fascinated with these models, the balls may be choking hazards and are not recommended for children younger than 5 years of age. The MagDNA magnets may also represent a hazard as swallowed magnets may cause intestinal complications and even death. Due to the more sophisticated nature of DNA science, it is not recommended for children younger than 9 years of age.