My 14 year old son said that he would like to "blow things up" this summer. Without blowing him up, I'm interested in semi-safely indulging this interest. I've often met interesting people who spent their teenage years on farms or in basements with chemistry sets, doing such things, at least in the days when you could buy the needed materials from the drug store or order them. I know it's not that easy anymore. But is there something we could do, fairly tame, but not too tame? I have no idea where to begin...