These are loud and very cheap to make .
Materials:
About 20 strike anywhere match heads
Strapping tape
2 Quarters
Wire cutters
Step 1: Take the wire cutters and cut all the match heads off. And put them aside.
Step 2: put all the match heads in the middle of the first quarter and then add the second quarter on top.
Step 3: wrap the two quarter very tightly in strapping tape about 6 layers.
Step 4: Take a the quarters and set it on some concrete and pick up a rock or hammer and smash it/ throw it on the quarters. You will receive a loud boom. Very satisfying, indeed.
(or if you think you are cool, you can try to throw it against a hard surface)