Together with my daughters Luciana (14yo) and Paloma (7yo), I assembled the foldscope following the video instructions. Our kit was missing the high mag lens. We received two foldscope sheets, two low mag lenses, one condenser lens, one LED light source, tape coverslips and one phone camera adaptor. We prepared two slides with the tape coverslips, and were able to assemble and visually test both foldscopes. We left the slides in the foldscope overnight. The next day, one of the lenses was damaged (I am not sure why this happened, but probably related to having left the slide in the microscope overnight.) The other microscope was OK. We took a picture of a human hair sample prepared on the tape slide, using the camera of an iphone 4s, by laying the foldscope on a table and then laying the phone or tablet on top of the foldscope (the camera location of the iphone4s does not allow one to use the camera adapter).