Introduction: How to Make a Marshmallow Gun or Marshmallow Shooter

This marshmallow gun (marshmallow shooter) will completely surprise you with its accuracy, range, and ease of construction. Plus, it's tons of fun and a lot better than any store-bought toy because it encourages modifications.

Marshmallow shooter kits with all PVC pieces pre-cut are available in the Instructables store!  

This project appears in print as part of Best of Instructables Volume 1.

Instructions are here for the Soda Bottle Safety Goggles.

Step 1: Plans

Get the plans for the gun here or click on the "i" in upper left of the image to get a larger size.

(22 inches of 1/2 PVC pipe (1/2 is a the nominal diameter, its actual outer diameter is closer to 7/8 inch), 2 end caps, 2 three way junctions, and 2 elbows.)

Step 2: Cut the PVC to Length

Cut 1 length of 7 inches and 5 lengths of 3 inches.

Hacksawing is a good choice for this step; here is a How to Hacksaw tutorial.

Step 3: Assembly

Layout your pieces and assemble them. Friction should hold them all together.

Step 4: Test

Put on your safety glasses.

Point the gun in a safe direction. Load a minimarshmallow into the mouth piece, seal your lips to the mouthpiece, and give the gun a quick burst of air.

Yes, the marshmallow does go around all those curves. Pretty cool, huh?!

Keep your ammunition sealed. Dry marshmallows don't work very well.

Clean up your marshmellows when you're done. Especially, don't leave any around roads: they will attract animals to be hit by cars.


shadowman2 made it! (author)2007-06-30

Here's a pic of my marshmallow shooter, it is compressed air powered. I think this is the simplest design you can make, for an air powered gun that is. I decided not to make an instructable on it, because there are lots of other instructables on air powered guns. And also, this design is self explanatory.

frenzy made it! (author)frenzy2010-06-15

This posting has won today's I Made It Challenge. For that you will recieve a 3 month pro membership!


Amanda Culbert made it! (author)Amanda Culbert2013-09-02

Wow congratulations!!!!

Bran made it! (author)Bran2007-07-01

I've been trying to find a good tut on something like yours! All I could find were oversized "potato guns". Could you either post an Instructable on how to, or PM how? I think I have most of it figured out, but could you let me know what the small, black thing is on the bottom? I take that is how you fill the bottle with air. Thanks in advance! Btw, how far does this thing shoot? It's awesome.

silm made it! (author)2017-04-22

And i thought marshmallow is some sort of eating stuff.

ksutton6 made it! (author)2016-01-26

I made it but need marshmallows

Sir_locust made it! (author)2015-12-23

The marshmallow go so fast! i do not expect that! it is very fun, you better try it.

debeecole made it! (author)2015-10-06

our guns.

stacy.sullivan.900 made it! (author)2014-11-24

These are sooo much fun!!! My kids have hours of fun with these!! Awesome stocking stuffer

Gilan made it! (author)2014-10-09

I made this, my advice... take the front handle bar turn upside down, take of the end cap carefully fill with marshmallows, put end cap back on, blow if you did it right you will have a machine gun marshmallow gun

nolalito123 made it! (author)2014-07-29

I wanna make this

DanTDM made it! (author)2014-05-03

I made mine a little different. It shoots a little too far for indoor fun.

jerame.bosarge made it! (author)2014-03-15

This instructable is the reason I joined instructables! used the commic as plans for a cub scout project. This was a big hit!

juliblue made it! (author)2012-07-25

This is so fun, I just finished cutting up enough PVC for 10 'guns' for my daughters 11 th bay party. I plan to send the kids through our small park retrieving parts from strategically placed brown paper bags with clues & directions, and then making them work together to put together & assemble. I found food coloring spray to color the marshmallows for fun ( lavender & orange) and at the end when they are built, they can have a "war"! Then onto to cake & ice cream! I will let you know how it goes making the pieces found in a hunt... I think it will keep them busier the just building them .

porcupinemamma made it! (author)porcupinemamma2014-01-01

Hi juliblue :0) I was thinking about how much fun it would be for kids to do a "make and take" party -ahh yes 'tis true, great minds think alike.Your party sounds totally awesome! Please leave enough lead time for my invite to arrive because Snail Mail is especially slow in Canada. I assume casual attire is the way to go. Yes? ;0)

zuzubird made it! (author)zuzubird2013-10-26

Juliblue, Terrific ideas! What an awesome birthday party for your daughter and her buds. You sound like a great mother.

bgepp1 made it! (author)bgepp12013-04-15

very cool - that sounds like like an incredible party!

porcupinemamma made it! (author)2014-01-01


lovethebackwoods made it! (author)2013-09-17

I love these Instructables! The first mini-marshmallow guns I made were an adaptation from one I read here and my youngest grandson and I have had a ball with them from the time he was a pre-schooler (he'll be eight in a couple of days). Because my husband is a veritable Renaissance Man, his toolboxes include a pipe cutter. They're not very expensive and they make very quick, easy cuts on PVC pipe. Great job on this 'ible, with neat pictures (and I don't mind the "lies"!).

Mariska Botha made it! (author)2013-09-04

Love the cartoon, hehe, so cool.

BunnyRoger made it! (author)2013-09-03

Cool fun fun and more fun hehe

MAApleton made it! (author)2013-08-29

Hehehehe, that little boy looks so so cute with his gun. Loving this idea.

BigMatt333 made it! (author)2013-08-15


Electrocanman made it! (author)2013-07-02

I know I'm late to the party but I had to say thank you for the simple and clear plans! I know five adults and four kids who are going to have a super marshmallow war on the 4th!

BLUEBLOBS2 made it! (author)2012-05-12

This is awesome. I love how you used PVC pipe for this 'Ible. The safety goggles are awesome!

radioloris made it! (author)2012-03-24


I made 24 of these with my 2 inventor's lab classes today...ages 7-14.


ramicaza made it! (author)2011-10-31

I made a mash mellow gun that shoots 700 fps no I don't use marshmallows as my primary ammo but when I do, I sure do have a blast...  the link is bellow HERE

jjone538 made it! (author)2011-07-30

You should put how easy or hard a instructable is so u kno how hard it is

Brass bum made it! (author)2007-05-20

do you reckon you could integrate a CO2 canister firing mechanism?

rrrmanion made it! (author)rrrmanion2010-09-16

depends on the pressure of it, it migt be too igh for this plastic piping, but aluminium piping may be able to handle it

skelly7447 made it! (author)skelly74472011-07-20

not at all, this stuff can take over 100 psi if glued properly. the main possible point for failure is the joints

Lego man 201 made it! (author)2011-03-27

send me the instructions

tracyo made it! (author)2010-12-21

just so you know the marshmellows where i live dont fit into a 1/2 i have a whole bunch of pipe cut and cant use it ....i have been drying the marshmellows for 2 weeks now and they still dont fit..but that kind of defeats the purpose of the marshmellows being soft and not hurting anything...might have to take a marshmellow to the hardware store with me

androuman made it! (author)androuman2011-01-03

Exact same happened to me, i wasn't shure if it was the brand of marshmallows i bought, but it was easily enough solved by putting the marshmallow between my palms and rolling it into a "ball". roll for about 10-15 seconds and the marshmallow will fit perfectly into the tube

ilpug made it! (author)2010-12-23

for a test of principle, just get a normal unmodified peice of 1/2 inch pvc and shoot them out of that. probably work better than any fancy gun.

ilpug made it! (author)2010-09-30

theres a dude in my town who sells a slightly different version of these. his can shoot someone in the face accrately at about 80 feet. he takes them to thrash metal concerts and shoots it into the mosh pits.

mrschneeebly made it! (author)mrschneeebly2010-12-22

What is different on those that he sells than the one here? It would be sweet to shoot a marshmellow 80 feet.

ilpug made it! (author)ilpug2010-12-22

his guns are in-line without the elbow on top, they are just a straight pipe, with handles, they might have a litttle bend in them, he makes both kinds.

mrschneeebly made it! (author)mrschneeebly2010-12-23

Oh ok thanks, I'm going to try that design out.

acer73 made it! (author)2007-05-20

are the safety glasses nessesary

kelseymh made it! (author)kelseymh2008-11-22

Yes. Marshmallows or no, weapons-fire training should always include the use of safety equipment. If for no other reason, it trains the habit for when it really does matter.

Remember, "It's only fun until somebody loses an eye."

Oh, crap. Now I sound like a boring old parent :-(

Tommyhzy made it! (author)Tommyhzy2009-03-01

Lol, "It's all fun 'n' games until somebody loses an eye... Then it's freakin' HILARIOUS!!!"

freakyqwerty made it! (author)freakyqwerty2010-12-18

Nah it's still fun and games when somone loses an eye, only without depth perciption!

amyer911 made it! (author)amyer9112009-03-06

you guys are so wrong the correct statement is "ITS ALL FUN AND GAMES UNTIL SOMEONE LOSES A TESTICLE"

superhubbardman made it! (author)superhubbardman2009-07-02

in which case we tell ur mum to go home >< na jk sooo do you put the marsh mallow in ur mouth b4 u blow or what?

budd42 made it! (author)budd422009-03-08

then its just down right frekin painfull but if its not you... different story

jokerlz made it! (author)jokerlz2009-01-16

And that person has to wear an eyepatch and becomes a pirate... pirates are fun

kelseymh made it! (author)kelseymh2009-01-16

And do you know why pirates are fun? Just because they aaarrrrgh!

The Fudge Monster made it! (author)The Fudge Monster2009-05-19

That was awful :D

jokerlz made it! (author)jokerlz2009-05-19

And if a pirates favorite place to drink is a baaaarrrrghh , and his favourite shape is a staaarrrgh then what is a pirates favourite mode of transport?

About This Instructable




Bio: Eric J. Wilhelm is the founder of Instructables. He has a Ph.D. from MIT in Mechanical Engineering. Eric believes in making technology accessible through ... More »
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