Dimensions: 4.75 X 2.25 X 1.5 (HxLxW) Item Number: #36242 UPC: 729343362421 Price for 6: $10.00/each Price for 12+: $8.00/each MSRP: $19.99/each The earliest microscopes were called flea glasses as they were originally used to study small bugs. The first microscope was invented by Hans and Zacharius Jansen in the 1600s and has gone through numerous improvements over the centuries. Today, we can see an entire universe of minute organisms, thanks to this ingenious device.