This instructable will show you how to make a cheap and easy "slingshot" small enough to fit in your pocket but strong enough to break stuff! A word of caution before we get started, depending on how well you make this thing you could seriously hurt yourself or others, the household pets, or various nick nacks. Now that you are properly warned, let's go!
 
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Step 1: Gather the needed materials:

one regular sized round ballon
one empty juice bottle
scissors
optional: corn starch or baby powder
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person% says: Jun 15, 2012. 12:17 AM
I've just made a similar one and it can shoot about 70 metres!
person% says: May 25, 2012. 11:38 AM
there could be less chance of the balloon slipping off if you wrap a rubber band around the neck a few times (that's strangling).
boom man56 says: May 17, 2012. 8:36 AM
I shot some bbs and it went farther than I thought it would.
boom man56 says: May 17, 2012. 8:18 AM
what dose it shoot
Plo Koon says: Sep 19, 2011. 10:20 AM
Is it as powerful as an airsoft gun when using airsoft ammo? rsvp.
QwertyuioLP says: May 12, 2008. 3:44 AM
I stick stuff like flour in the balloon or my homemade paint ball's in ther. P.S. If you would like me to post my homemade paint ball's answer this message and I'll post it.
boomboy123 says: May 29, 2011. 8:35 AM
plz post how to make paintballs
Bartboy says: Aug 5, 2008. 3:26 PM
post?
QwertyuioLP says: Aug 6, 2008. 9:45 PM
I am, just got a problem
Phoghat says: Jun 29, 2008. 4:19 AM
I'd be interested. Why don't you post it?
radjokester says: Jun 29, 2008. 12:01 AM
hey will you send me it?
krin96 says: Aug 8, 2010. 6:14 AM
no cool
bunduk says: Apr 24, 2007. 11:06 AM
this is really cool i will make one later ad tell you how i did also if you like shooting stuff check out the range of knex guns on this site -bunduk
the true king o fools says: Apr 19, 2008. 8:46 PM
all knex guns do is flood this web site with crap!
Neovenetar says: Aug 7, 2010. 2:00 PM
bloody knex...
Phoghat says: Jun 29, 2008. 4:22 AM
So true. Do a search here for a Firefox extension that automatically deletes from your search Kenex projects and gives you the ALLSTEPS view too.
the true king o fools says: Jul 10, 2008. 12:11 PM
The one that involves greasemonkey? yea ive got that one.
smboling says: Jun 2, 2008. 3:58 AM
I know. Like, if you type in gun in the search bar, half of them are Knex guns!
popomaster says: Jul 25, 2008. 8:37 AM
i like knex guns too, but when im trying to make something like a rifle, not a knex one, it pisses me off too think that there might be what i was looking for but i have to go through hundreds of knex submissions AND i end up not finding what i need. im like "what the hell!?"
garrett10 says: Jul 6, 2010. 8:44 AM
Just a little interesting fact I wanna throw out there, this is the instructable that brought me to instructables.com a couple of years ago! 5 stars!
i make shooting things says: Mar 28, 2007. 1:46 PM
id put tape or string to keep ballon from sliping off and hitting you in the hand
deansep says: Apr 27, 2010. 12:45 PM
 hot glue it
i make shooting things says: Mar 29, 2007. 2:40 PM
this is the most powerful, simplist, smallist gun iv ever made. I put a BB through 3 dr. pepper cans. it works great thank you.

BTW do not shoot short dowels or short matches, the dowel went throught the ballon and into my hand not fun.
the true king o fools says: Apr 19, 2008. 8:48 PM
Dr Pepper RULEZ!!!!(random)
tomtrollkiller says: May 22, 2009. 10:09 AM
Lol yeah i agree doctor pepper does rule hahaa
Perfect Sky says: Nov 21, 2009. 7:02 PM
ditto
wolf996 says: Jan 25, 2012. 3:23 PM
Ditto Ditto
casvandegoor says: Mar 30, 2007. 10:39 AM
I know....
SBD (author) says: Mar 29, 2007. 3:10 PM
Ouch! Hey I warned ya! Glad to hear your having fun with it though.
SBD (author) says: Mar 28, 2007. 2:31 PM
If you use the neck of the balloon as a rubberband it is usually tight enough to hold it on. Take another look at step 5. Of course if that is not working for you then mabye you cut the balloon so that the opening is too big or you need a smaller balloon.
SBD (author) says: Mar 28, 2007. 2:34 PM
Another thing could be the type of bottle you used does not have a deep enough groove to put the balloon neck over to keep it on tight enough.
Technical Renaissance says: Mar 28, 2007. 2:19 PM
A zip-tie would work well too...
dcshoeco33 says: Mar 28, 2007. 3:50 PM
i was looking and thinking and why not keep the cap and make it basically just the threads so you can stick teh baloon on and then the cap over to make it stay and so you can shoo through it still
bsling.bmp
wolf996 says: Jan 25, 2012. 3:23 PM
What The Heck
Phoghat says: Jun 29, 2008. 4:23 AM
Now that's a great idea. I was just thinking along those lines
SBD (author) says: Mar 29, 2007. 3:11 PM
I can honestly say I have never thought of that. Try it out and let the rest of us know how well it works. Good thinking! ;)
dcshoeco33 says: Mar 30, 2007. 3:13 PM
it works very well i havent had the baloon fall off once :)
SBD (author) says: Apr 15, 2007. 5:09 PM
Cool, what bottle did you use?
gwite90 says: Nov 8, 2007. 8:28 AM
you can also use a hair roler and a latex finger off of a latex glove its stronger
CraftySNAK3 says: Mar 30, 2010. 8:54 PM
or polyvinylchloride
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