Introduction: Ninja Bombs

Picture of Ninja Bombs

Have you ever seen the Batman movies and been amazed at all the gadgets the dark knight packs into his utility belt? Well I did the research and came up with a way to put you into Gotham's greatest hero's shoes by creating his famous smoke pellets!

This is an impact smoke pellet, which means when it strikes something with enough force it'll go off. How it works is by a chain reaction of different things to ignite the smoke-creating element.

Step 1: Materials

Picture of Materials


-Snappers (left over fireworks)

-Tissue paper

-Black Powder

-Magnesium Fire Starter

-Potassium Nitrate and Sugar mix (there are some instructions on how to make this online for more info)



-Ping Pong Balls

-Black Spray Paint

Step 2: First Layer: Snappers

Picture of First Layer: Snappers

To start, cut two equal sized squares of tissue paper. Set one aside for now.

Next take 3 snappers and cut them open. Pour them all into the center of the tissue paper. Set this aside.

Step 3: Grinding the Magnesium

Picture of Grinding the Magnesium

Take your magnesium fire starter and remove the flint rod from the magnesium (I did so by clamping a large nail in a vise and placing the flint rod on the point and hammering down gently).

The next step will be to grind this into powder. Take your file and lay it down. Then slowly and gently scrape the flint rod along the file. You can then transfer this dust onto a small sheet of paper.

Keep doing this until you get a decent sized pile (use my image as a reference). Once you have enough just sprinkle it on the layer of snappers you previously laid down.

Step 4: Black Powder and Potassium Nitrate

Picture of Black Powder and Potassium Nitrate

The next part will be adding a little more flammable fuel to your smoke pellet. Take some black powder/ gun powder (If you can't manage to find this as is, then try opening something that has it inside it. i.e. firecracker (just the black powder not the bentonite)) and sprinkle it onto the snappers and flint. It is important that you don't mix these when combining them, we need them to ignite in a specific order.

The final part will be putting a chunk of your potassium nitrate mix on top of it all.

Step 5: Wrapping

Picture of Wrapping

Take all four corners and bring them to one point and then twist until you have it moderately tight.

Then take your other tissue square and place the penny in the center. Then put the wrapped item on top of the penny and wrap it all up.

You can now tape the top and trim it so it is smaller and won't unravel.

You have now completed your very own impact smoke pellet! Keep reading to see how to make it look like one of the Dark Knight's gadgets!

Step 6: **OPTIONAL** Ping Pong Housing

Picture of **OPTIONAL** Ping Pong Housing

First you'll need to take a ping pong ball and cut along the seal. Then depending on what color you want, spray paint the two halves.

When that's done drying, hot glue (or tape) the impact smoke pellet into one half of the ping pong ball.

To seal it up just put a ring of hot glue around the area you cut and put the other half on top of it. You may also want to clean it up a bit and reinforce the seal.

When the hot glue is all done drying, your Batman Smoke pellet is complete and ready to tested!

Step 7: How It Works

Before I show you the finished product in action, I think I should explain how this little contraption works.

1) The penny acts a flat surface for the snappers to hit and activate.

2) The snappers then activate due a coating surrounding the rocks that creates a small spark.

3) That spark then ignites the flint powder which makes the spark a little bigger.

4) Then the spark given off by the flint is enough to ignite the black powder.

5) The flame created by the black powder is big enough and strong enough to then burn the potassium nitrate which smokes quite a bit.

This chain reaction of elements is a little lengthy but all together a pretty simple concept. Now that you know Batman's secret to his famous smoke pellets, its time to put it in action.

Step 8: Testing It Out

Picture of Testing It Out

First what you need to do is go out and find a band of criminals somewhere that you can disappear from... or maybe just go outside! Then to make it smoke just throw it down! (make sure you throw it right-side up, if you put it on a table or the ground it should automatically position itself that way because it is attached to one side) You will hear the casing pop open and then the smoke will follow. For added effect get a crowd and stand by a corner, then throw it down and run behind the corner so it looks like you've disappeared! (This may only fool the young ones though)

Congratulations on making your very own gadget worthy of the Dark Knight's utility belt! So all that's left to do is to go out and protect the streets of Gotham!

Click here to see it in action!

**NOTE: The potassium nitrate will burn, so be cautious and never throw this at anyone. Also it will leave your ping pong housing a pile of melted plastic so if you don't want to take all the time making it I suggest leaving that step out, it is purely aesthetic.**


AidenF1 (author)2016-03-25

Is this illegal

ladymda (author)2015-06-29

If you throw this at carpet will it catch on fire?

NoxiousOnions (author)ladymda2016-01-02


CaptainA1 (author)2015-06-25

How do I make the smoke bigger so when I throw it down no one can see me thru the smoke??

bacon_builder (author)CaptainA12015-11-05

Use like fifty of them


Jason da god (author)2015-07-31

BATMANluc (author)2015-07-06

Where did you acquire the black powder?

coke87 (author)2015-05-11

what if i dont have a magnesium fire starter? can i use something as a substitute for the flint rod??

Asamati98 (author)coke872015-05-11

I would assume anything that easily ignites (some kind of powder would be the best way to go).

coke87 (author)2015-05-01

and what is Spectracide Stump remover? is it a substitute for the KNO3?

Asamati98 (author)coke872015-05-01

It is KNO3, Spectracide is the brand and it is sold as stump remover. you could find it at Walmart or most gardening/landscaping type stores.

coke87 (author)Asamati982015-05-11

I tried to find some KNO3 but no luck. Can I make these smoke pellets even if i dont have KNO3? I have everything except potassium nitrate. Can i still make these if i dont have KNO3??

coke87 (author)2015-04-30

where can i find some potassium nitrate and spetracide stump remover to create this awesome DIY??? please help because i am gonna make this ASAP but i need to know from my question above. Thanks

anthony.nailon (author)2014-12-23

just judging by the measurements you used it didn't make that much smoke obviously using more then one would make more smoke but would upping the amounts inside of one create more or would that just make it more volatile?

CBlaskowsizzle (author)2014-09-17

is the smoke it produces toxic?

No gunpowder smoke is entirely safe to breathe in. It's not safe to eat though.

PaleHorseRider (author)2014-12-15

Just steal some shotgun shells and cut off the plastic end. Then separate the lead and gunpowder

metalshiflet (author)2014-12-03

Would this be usable inside?

ianmcmill (author)2014-08-08

It crosses my mind that I have some KNO3 laying around in my bedside cabinet (no joke).

Why are ping pong balls optional ? Aren't they mandatory ?

Asamati98 (author)ianmcmill2014-08-09

No actually they work when wrapped in the tissue paper just fine, the ping pong ball shell is just to give it that "Dark Knight" look. (I figured I would put that little disclaimer thing in to warn people that if they make the shell it will melt and there is no getting it back.)

Eunix (author)2014-07-09

Nice! If I had access to KNO3 I would probably add a little more of it with some sulfur maybe, to get more smoke.

Asamati98 (author)Eunix2014-07-09

Oh yeah good idea, and I don't know if you've already checked on this but I got mine from Walmart for $4. It was sold as "Spectracide Stump Remover".

Eunix (author)Asamati982014-07-10

Yeah, but where I live thy don't sell stump remover, and any kind of obvious chemicals that could be used in explosives are ilegal...

Asamati98 (author)Eunix2014-07-10

Oh that sucks, well if you can at least access black powder I suppose you could just use more of that... You can get a decent amount of smoke from just black powder.

ianmcmill (author)Asamati982014-08-08

Well I guess where potassium nitrate is under regulation, black powder is accessable at every gas station ;). I wonder why such explosive compounds are available in a country like the US. Oh, yeah they sell guns at wallmart too. Haha.

S0uraV_DAS (author)2014-07-14

Nice work! Now we can all use this stuff and create smoke in the math class!!(just kidding)

willnate (author)2014-07-08

Hate to break it to ya but that rod is flint and the rest is magnesium

Gabse (author)2014-07-08

Kipkay made this a few years ago

About This Instructable



Bio: I am a student who likes to build and tinker with things and I use my heritage as a basis for inspiration in my daily ... More »
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