They are cheap and plentiful, but glass uniformity varies greatly from bead to bead. It's hard to find one (especially at higher magnifications) that doesn't distort the image too much. That being said, if you're willing to take the time to find a good bead, that's pretty cool!
π Laminated Anatomical Pack for Skeleton Ligaments
3 Review
KISSTAKER Removable Heart Visceral Educational Parts
3 Review
π Musculoskeletal Anatomy Chart by Palace Learning
3 Review
π©Ί Anatomical Laminated Respiratory Circulatory Pack: Enhancing Understanding and Visualization for Medical Professionals
3 Review