We were wont to make Drano bombs. We would obtain a 2"dia,x 4"iron pipe nipple and endcaps,pour half full of water and put a wrapped paper towel with say 6 ounces of Drano crystals.

Shake it up and throw it as far as you could.
Generally in less than a minute ...deafening explosion and shrapnel falling all around us! Fortunately the Gods who watch over fools and callow youths was with us.

The best was when we threw one into a '61 Falcon belonging to some misanthropic ******* who hated teens............not only was all the glass destroyed but the roof looked like a missile had shot out of it.

Great days Man,great days.......