Awesome ric!!! You and I are peas in a pod!!! Myself and my highschools chums used to make the same kind of bombs, but we used muriatic acid (the joys of pool chemicals, right?). We took the empty 2 liter bottle, put 3 or 4 crumpled pieces of aluminum foil into the bottle and poured in the acid to cover... close the lid tightly, shake the bottle and THROW IT AWAY FROM YOU!!! LOL. No fire or smoke, of course, but... BADABOOOOOMMMM!!!!

Then again, we also used to make home-brewed napalm out of Ivory liquid soap and gasoline... those were the days!

(what the hell were we thinking?!?!?!?!)

Oh and yes... to answer the thread- we also built and launced model rockets. Fun times, but running after them and trying to figure out where they landed (inevitably in some wooded area) was a pain in the rear.