Pros: Professionally prepared Standard size Smooth edges Clear labeling Variety stimulates imagination Stimulates interest in science Cons: None What I have in the pack: 1 x LAKWAR 120 pcs. interest the younger generation in science. Prepared slides are simply necessary for those who do not work with these tools constantly or even part-time. I picked up a few sets for my grandkids. They love looking at new things and are so excited to see something they have never seen before. It's a really great way to keep them away from their iPad, console or TV for a while. It helps activate their minds and help them understand what they are seeing. So we usually choose a slide and then read what we're going to see. They seem to like it. I could not find any guarantees in the product information or in the product description. I appreciate you taking the time to read this. I received this product in exchange for an honest review. All in all I didn't have high expectations for this set as the others I received weren't packaged very well or had extra slides. But this set was intact and well packaged. The samples were of good quality and well prepared. I hope this information was helpful. [4 Stars] This product is made in China.
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