Personally, I mix a 95/5 ratio of ammonium nitrate to blackhead aluminum, very intimately, and fill easter eggs with them. You can buy both on eBay, or with a ballmill, mill Aluminum foil and AN fertilizer. All from wal-mart...
They make great targets for shooting since the eggs are cheap, fluorescent, and innocently covered in flowers!
That mix requires a shockwave of 2750 f/s or higher to detonate. It is just slightly more powerful than dynamite.
Confined flash (I.E. M80) will detonate it as well, good flash has a shockwave of ~3700 f/s.
Buy an Estes rocket, salvage the electric igniter, and rewire a cell phone, and voila! Remote detonation!
And, by the way, it is legal to make this stuff, but technically not to store it or use it in any state where it is illegal to use noisemaker type fireworks.
PS: Its illegal to light firecrackers in Idaho, but its legal to sell them, so don't think cause your state sells em its legal