My First Lab Duo-Scope ($69.99) I've tested a lot of toy microscope sets over the years, but this is one of the very best. The lenses are also much better than most, providing a good range of 4, 10 & 10x magnification. It has 3 lenses: 4, 10 and 40X. But, as anyone who has tried a toy microscope will tell you, magnification without adequate light is a recipe for failure. Luckily, the "duo" in the name of this 'scope refers to a pair of built in lights that provide clear, bright illumination. You need two lights because sometimes you might want to light things up from the bottom so you can see "through" them; other specimens need to be lit from above. This can do both. The set comes with an array of sample slides, though perhaps not as many as come with others, and a variety of slides and specimen holders.