These slides are just amazing! When we bought a microscope for our 9-year-old daughter, we were concerned that if she couldn't figure out what she was seeing, she would quickly lose interest. I'm so glad I found this set! Handbook of Pure Gold. Each pattern is marked and numbered according to the booklet. Each slide is devoted to 3-4 very detailed and interesting pages. My kids can quickly look at the microscopic picture (which looks exactly like the one on the slide) and identify all the parts of what they are looking at. I can get lost in discussions of cell function, classification, life cycle, and fun things that include historical facts and popular links. The pages are filled with color photos and clear diagrams that perfectly illustrate the text. The slides are well prepared and very clear/easy to see. I hope RS Science decides to create more sample sets like this one. We want more!