"... Yes they are safe. Are there some hazards associated with them? Yes, but of a very minor nature. The whole idea of them is you learn from handling real mat

"... Yes they are safe. Are there some hazards associated with them? Yes, but of a very minor nature. The whole idea of them is you learn from handling real materials, ..." Hmm I remember doing that & learning about the burn properties of sulphur. I had a lab under the house. My dads vice held an old bent spoon where I could mix things up and burn them. It was the first time I found a noxious gas burning sulphur, looking at the small blue flame. Taking a small breath of the stuff gave me a bit of a fright as the gas (SO2 or sulphur dioxide) literally sucked my breath away. I just discovered my first oxy-philic reaction :) (previous chemistry set Qs: http://www.hnsearch.com/search#request/all&q=bootload+chemistry+sets http://www.hnsearch.com/search#request/all&q=bootload+ch...)