Introduction: Simple K'nex Grenade by Bradley

Picture of Simple K'nex Grenade by Bradley

In this Instructable, I will show you how to make a grenade from 2 halves of a knex ball(sold in the 250 piece set with 150 bonus parts, and maybe some others, but this is where I got it ), and a spring. I got mine in a nerf gun. Also, a red rod will be helpful.
Let's get started!

Step 1: Assemblance

Picture of Assemblance

The red rod is just here to help, you don't really need it, though it is fairly difficult without.
Also, shrapnel may be added, just put it vertically so All the shrapnel won't fall out of one of the halves, then press the two halves together.

Step 2: Done!

Picture of Done!

Wowie! We're done already! To detonate just throw it. Please don't be harsh. This is my first instructable, and I hope you like it!


singerboy41 (author)2015-03-30

I have the perfect spring that would work :) I have no ball pieces, though :( I wish I did, I would go throw this at my brother right now.

Whaleman (author)2007-11-12

Nice, I had had this Idea for a long time, but no spring that would work =(

Dumchicken (author)Whaleman2011-06-29

i got mine from an old game cube turbo controler

Me too :( Only elastic bands.

If you have a spring donation then please post it to ..18 Sodsbury Terrace, Hooverhampton, Bingoland.

Bingoland, eh? Can't say I've ever heard of that place before.....

It is also known as Mecca :P

Ain't that where Muslims are supposed to face when they prey five times a day?

Prranavan (author)2009-04-10

It is good but if you fill the inside of the ball with blue spacers and green rods, it will be a lot better

eneergcam (author)Prranavan2009-06-19

i did that too:)

eneergcam (author)2009-06-19

i thought of this when i was like 10.

Mr Tenacious (author)2007-11-13

Nice idea. I would like to try it but i have no ball, what set do you get them from?

Prranavan (author)Mr Tenacious2009-04-10

u can get it from the "BIG BALL FACTORY" set

Fenderpony (author)Mr Tenacious2008-08-13

you can get the ball pieces in the wind up motor set with a red small bin. theyre kinda easy to find so I think you wouldnt miss it in the toys section.

Bradley1000 (author)Mr Tenacious2007-11-18

I said in my intructable where to get the ball, It comes with the 250 piece set with 150 bonus pieces. I found that set on for about 20 dollars.

jakesllama (author)2008-03-09

great now all you need is a GRENADE LAUCHER!!! good work

An Villain (author)jakesllama2009-04-10

build this but please know that this is not mine

andrew13 (author)2008-08-12

Now fill it with airsoft BBs and its an airsoft grenade!

Japaneese taco (author)2008-02-02

dude this is sweet! I came across an idea that instead of picking up all the scattered pieces fill with baby powder. im doin that this morning

SeMi_AuToMaTic (author)2008-02-02

yeah, um it detonates for me as soon as it leaves my hand! maybe i've used it to many times. Its awesome though! +1

xero1 (author)2007-11-22

not bad nice idea

altaria1993 (author)2007-11-13

finally a good use for those darn balls :D

AHEM... Ball machines...

i ment in a way of arms and stuff :P

True. You could always launch them with a giant cannon...

i was thinking about that too :P

nerfer192 (author)2007-11-19

you sould fill this with airsoft pellets

Darth Trainman (author)2007-11-13

Simple, but it actually seems to work... impressive.

halo99 (author)Darth Trainman2007-11-16


nerfer192 (author)2007-11-15

sick idea but i dont have the right peices :-(

tater killer (author)nerfer1922007-11-15

go to for the ball

Knex Lego Maniac (author)2007-11-14

SR-v1 coming soon!

Pax415 (author)2007-11-12

Cool instructable

About This Instructable




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