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¬ Biological Education DIY Science Microscope Specimens
3 Review
π¬ Specialized Apologia Microscope Prepared Specimens
3 Review
Prepared Pathology Research Quality Microscope DIY SCIENCE
3 Review
π¬ Celestron 44412 Prepared Microscope: Comprehensive 100 Piece Set for Optimal Microscopic Exploration
3 Review
KISSTAKER Removable Heart Visceral Educational Parts
3 Review
π Musculoskeletal Anatomy Chart by Palace Learning
3 Review
π§ Enhancing Anatomy Learning: Portable & Detachable Enlarged Anatomical Education Aid for Students
3 Review
π Laminated Anatomical Pack for Skeleton Ligaments
3 Review