Glue and scissors are optional.

If you decide to cut the strip off or accidentally rip open the box, don’t worry. You’ll be taping up the box quite excessively later. Ripping the striking strip off is just done out of convenience.

Alternatively, you can fold the striking strip to fit.

If you’re concerned that the strip will not hold its place, you can glue or tape the non-striking side onto the top of the inside of the matchbox. Make sure your matches are all facing the right way (with the match heads facing the inserted striking strip). Align them by tapping the box on a surface.

Tape it tight or almost air-tight. This will ensure the matches stay in place and maximize its combustion effect. You should hear no rattling once you’re done taping. For a bigger explosion, use duct tape or electrical tape. It’s stronger and will help make the box more airtight. For a more prolonged, flaming effect, masking tape or any paper-based tape will increase the flammability of the bomb.

The match heads will rub against the striking strip and ignite. The gases from the flame will need to escape and since the box is almost airtight, a small scale explosion will follow to allow it to escape. [1] X Research source Have a fire extinguisher or any other fire safety measures at ready in case an accident happens.

Although the remaining match heads won’t be making contact with the striking strip, they will be lit on fire by the other match heads.

Tape it tight or almost air-tight. This will ensure the matches stay in place and maximize its combustion effect.

Have a fire extinguisher or any other fire safety measures at ready in case an accident happens.

For this particular fireball, one striking strip is all that is needed.

Don’t shake the structure too much or the match heads might ignite. You might not be able to fit all the match heads inside the loop. Adjust the striking strip accordingly or save the match heads for later.

Have a fire extinguisher or any other fire safety measures at ready in case an accident happens.