I wish this chemistry set were a bit less expensive, but the quality is quite good. It contains all the materials needed (and many experiments can be done at least twice), and the explanations of the science behind the experiments is the most clear of any chemistry set we've tried. It's rated age 14+, but my 10 year old was able to do it with a bit of help from an adults, and he loved it.
I did these plus the fire lab with my 10 and 14 year olds. We were all very impressed! They all had the wow factor that we've missed doing other science experiments in the past. The science is explained thoroughly and in a way that is understandable.
The whole family enjoys the fire lab. You must be prepared to supervise younger ones. I prefer to shop for specific crates rather than do the subscriptions. This was the first set I purchased outside of the monthly subscription plan. So glad we did.