I followed this video to make a microscope stand for my smartphone and it works really well! I pretty much followed the video exactly, it’s really easy all you need is some wood, nuts, bolts, plastic, springs, and a dollar store laser pointer. Here are some pictures I got with it. I definitely recommend this project it takes no time at all and I'm still having fun with it years later.
Ballpoint Pen
Felt Tip Marker
Paper
Failed aluminum sample from a solid mechanics lab, loaded in torsion.
One of those seeds that sticks to your pants.
Canadian Money
American Money
Hornet
Spider Leg
Solder Pad on a PCB