My 4 year old daughter is very passionate about science and all things STEM. We gave her this set of slides and hooked them up to a Carson pocket microscope. I am very happy with the quality, especially for the price. We didn't want to invest a lot in a microscope kit just yet because it's young and it was the perfect compromise. Together they are much better toys but not complex and not very fragile. My daughter is extraordinarily sensitive about things, so I'm not worried about her breaking it. I can't tell if they will be too fragile for another preschooler. I'm sure the slides will work well with any children's microscope. Overall, I highly recommend them! Microscope Carson MicroBrite 20x-40x zoom LED-illuminated pocket microscope.
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