Now I say "at least" because I have timed them from one minute to one minute and forty five seconds. I have thought it went out and it blew up two or three feet from me, and I thought, "I was going to pick that up!" JUST DON'T EVEN TRY TO PICK IT UP! Just leave it, trust me.
If you "plant" it in, say for example a card board box, it would burn down the box and blow away the evidence.
1.Power charges from any caliber I guess.
2.A lighter or match.
4.Thin string(preferably cotton)
5.Pliers(needle nose if possible)
This is exceedingly simple and should take you about three minutes to make. The size and loudness of your bomb will fully depend on what kind of power load you use. The amount of TP you use is crucial in how long you want it to burn.