This Instructable will show you how to make a popper sized time bomb that is quite easy and unpredictable in the time of detonation. I will warn you that it is very unpredictable, not that it might not explode trust me it will, but what categories it as a time bomb to me is the fact that it will burn for at least a minute if done properly.
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.
What you will need is mostly found in the home. All accept the power charges.
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.