A Foldscope microscope can be used to observe earthworms and their early developmental stages, including: 

• Species identification
• Foldscopes can identify species that are difficult to identify due to their small size, immature body segments, or absence of clitellum 
• Regeneration potential
• Foldscopes can show that newly hatched and juvenile earthworms have considerable regeneration potential 
• Internal organs
• Foldscopes can show the location of internal organs, blood vessels, and coelomic fluid