Flapping Wing 'Butterfly' with convex-shaped wings to get lift & some forward thrust in downward stroke. The upward stroke (akin quick return mechanism in 'shaper') offers low resistance due to shape, wasting minimum power. Currently in centimeters, we plan to scale-down.
Microscope - smaller is powerful
Use of sphere(s) as lens(es) in microscopes simplifies construction. As optics of thick lens applies, distortions in shapes is a negative effect, but it has no real negativity because aim is to 'detect' or observe disease causing micro-organisms rather than take their photogenic picture.
Current version of this microscope
CREDITS: our m'scope inspired BY FOLDSCOPE OF PRAKASH Labs
Best wishes from by Dr Frances Arnold, Nobel laureate