Introduction: K'nex - Mystery Box

Picture of K'nex - Mystery Box
Hey guys, now instead of doing my usual routine where I use pictures of K'nex guns from other Instructables members to build my own versions of theirs and then write a review on it but I have done something completely different.


Because I do enjoy playing Call Of Duty: Zombies on my PS3, I got the idea to build this when youtuber ZaziNombies made his own Mystery Box out of over 10,000 lego pieces and it thought to myself that I could make my own out of K'nex because I own loads of pieces and I knew the dimensions for one.


Anyway let's talk about the Mystery Box, basically it appears in every single zombie map in Call Of Duty: World At War, Black Ops and Black Op II and what it does is, it gives you a random weapon for 950 points. After the Mystery Box has been used several times a teddy bear appears and it moves the box to a different location in the map and you get your money refunded as well. If you pick up a Fire Sale power up, the box will spawn at every possible location and the price is reduce just to 10 points but this will only last for 30 seconds.


Parts List

Green Rods - 3187

White Rods - 2166

16mm Black Rods - 34

32mm Black Rods - 32

White Connectors - 780

Black 8-Way Connectors - 28

Blue Connectors - 962

Yellow Connectors - 129

Red Connectors - 6

Purple Connectors - 1110

Hinge Black Half - 33

Hinge Blue Half - 33

Total - 8500


Good Points

· Looks Like The Real Thing

· Doesn't Use Any Cut Pieces

· Does Included The Question Marks That Appear On The Lid

· Does Open And Close

· When It Open's It Creaks Like The Real Thing



· Height - 27cm

· Length - 120.8cm

· Width - 27.3cm


Overall I 'am very pleased with my Mystery Box, and probably it might be the only one on Instructables that is made out of K'nex when it is compared to the ones that are usually made out of wood.


Also check out my other creations and instructions


Thanks for reading, please leave a comment in the box below and subscribe/


master-splinter306 (author)2015-07-13

I really like this and I love getting the PPs-A1 out of that thing. Either that or the AK-47. Great job!

Thanks Mastersplinter, think you mean the PPSh-41

Oh yah, my bad

CorgiCritter (author)2015-02-12

Interesting... I wish I had the pieces to build stuff like this.

Thanks, well start saving up or wait until you get a paid job

Yeah, I could buy more pieces, but I am saving up to buy a .22 in the future.

Also, you say that you volunteer at the Warwickshire Air Ambulance. What kind of work are you doing there? Also, the ? marks on the top of the box are very cleverly done.

Well Corgi its basically voluntry work so I don't get paid but for 3 days a week, I help on the till and sometimes go out on the van to help collect and deliver furniture but I have been saving up my money for years which is why I own quite a lot of K'nex. Yes you are right about the ? marks coming out well. This .22, will it be either a pistol or rifle.

Ok, thanks for explaining about your volunteer work. The .22 I have been thinking about is a lever action rifle. It does not cost all that much, but I don't want to spend all my money on it and then not be able to buy anything else. To be honest, I probably wouldn't buy one for a year or two. Here is the link to the rifle:

I seen loads of them made out of wood but this is very impressive

That's ok, how about building a perk machine?

Well I don’t know since I never thought about it but thanks for the idea

akshat21045 (author)2014-02-16

Oh la la! You have a LOT of pieces. More than the best K'nexers out there on ibles!

hunter999 (author)akshat210452014-02-17

Really? So people like Shadowman, Sorunome, Sandro, IaC, Millawi Legend, Kairah.... The list goes on forever - they all have 30K + pieces and this only has 8500 which is less than a third. I don't really see how this tops the amount they have...

Sorry if that came out as offensive or anything - It was not intent.

akshat21045 (author)hunter9992014-02-17

I am talking about the ones who are there now. Shadowman, Sandro, and Sorunome are still active now, but IaC, Millawi, Kairah? I don't think that they are coming online now. Yes, I get your point, and I respect it... but as I said, there are still great knexers like Red, Jonny, you, who don't have that many pieces (Well, don't know bout Jonny).

Yep, even I don't have that many pieces, but yeah, I got around 5000. But still, I have more 3D connectors than him... :P

Also, I did not feel offended at all. So, I would still like to say in my favour, a correction in what I said above in my comment, "More than many great K'nexers out there on i'bles". And yes, he does have a lot of hinges and white connectors. And a LOT of green rods. Around nine times more than me!

I hope you understood my point. Of course, you are correct as well. Actually, both of us are correct at our own points.

hunter999 (author)akshat210452014-02-18

Also, I do believe that IaC is still active now since he mentioned a month ago he is working on a ball machine. To show that he is still building, he showed the community also a wheel, in which is a element one can incorperate in a ball machine..

Again, I may be wrong, but only time will tell.... :-P

akshat21045 (author)hunter9992014-02-18

Yeah, I saw that! It was kewl.

hunter999 (author)akshat210452014-02-18

heres the thread:

hunter999 (author)akshat210452014-02-17

Another question...(sorry)

Define what a 'great' K'nexer is.

akshat21045 (author)hunter9992014-02-17

As you have said, a great knexer is not who has more pieces, but a person who has enough experience to make good stuff. A good knexer should also be a versatile builder.

He/she should also have made something which has been featured, and/or something that has the capability of being featured but it could not (due to some or the other reason).

So, now I guess you know what a great knexer is!

hunter999 (author)akshat210452014-02-17

Oh right! Ok, I was not sure of the context that you were speaking in. Also I do understand your point - in order to be a "great" K'nexer, you don't have to have thousends of pieces (although it is beneficial). And I am not sure how many pieces I have. I do know have 1300+ in both purple and blue connectors combined though. Jonny has mentioned to me that he had 2 Original Roller Coasters - the ones from 1998. They both come with 2400 pcs and so double is 4800 pcs and I have no doubt that Jonny has brought some more since then to build something like the SRv3....

I might count my pieces if I have time, but for now, I am working on something else that is from K'nex.

Anywho, back to the point, I wasn't sure what context you were speaking in - I made an assumption that your were talking about the past and present and (future?) K'nex(ers).

Again I am glad you did not take the above comment seriously. :-P

whooo, that was a lot of typing *fingers ache*.

Thanks Aks, I had to order several blue and white connectors and also some white and green rods to as I didn't quite have enough pieces to build it.

Wow... Pretty cool!

Thanks Red, I do especially like the dark grey MP5K in your profile picture. If you made instructions, I would give it a review and it would be a very good one indeed.

No problem. I am glad you like the 1967 MP5K Prototype (as seen in Black Ops). It is actually my brothers (E Pluribus Unum), I'll tell him you like it, and see if he'll post it. The one aabove it is my MP5K PDW.

Yeah I look at the PDW and it looks good. Same here when I look at the MP5K and it immediately remind me of Call Of Duty: Black Ops. I do hope he does make the instructions, it looks very promising.

Again, I'm glad you like it. I'll see what I can do, but our shcedual is going to be pretty busy for the next week.

I have started building the Dragunov

The only difference, I will be making is I have built a different barrel that has a stronger structure as your barrel is very flimsy and does go of at abit of angle. Hope your are alright with this :)

Zombiekiller-93 (author)2014-02-16

Thanks Jonny. I have sat on it and the lid does bend a little bit. If I was to make it into a bench, I would first have to fill in the massive hole in the mystery box where the gun would go. Then I would have to increase the width to build a thing that I don't know the name to it so you don't fall back of it. You could also use it to store things like clothes, books, games etc.

JonnyBGood (author)2014-02-15

Looks great! To be honest I would almost like to use it as a bench. Deffinitly looks sturdy enough.

koolcoasterkid (author)2014-02-12

Ha, pretty cool! I know from experience that the box is a nice thing to have, only not when you get a crappy weapon :P

Looks very sturdy though.

Thanks Kool, here is a list of my top 5 worst weapons from the box

  1. EMP'S
  2. Springfield
  3. Kar 98K
  4. War Machine
  5. RPG

And to be honestly I like the SMR, it is a good weapon with Double Tap 2.0 for the early rounds if you go for headshots. What are you top 5 worst box weapons Kool

To be honest, its my borthers game and I have no clue what the guns are. :P
I just don't like the pistols. I do however, love the Thundergun.

Johnhall14 (author)2014-02-13

"Censored" That's a lot of pieces, now just make a gun to put in it : P

Thanks John, anyone of my K'nex guns such as my M14, PPSh-41 and my Thompson will actually fit in the box very well, one at a time of course.

Shadowman39 (author)2014-02-09

That looks really neat, and solid too!

Thanks Shadow, indeed it is have a very strong structure

War pig (author)2014-02-11

That's cool!!!!

Zombiekiller-93 (author)War pig2014-02-12

Thanks War Pig

sandroknexmaster (author)2014-02-11

Looks good!

Thanks Sand

Sorunome (author)2014-02-11

Haha, so solid!

Looking nice!

Zombiekiller-93 (author)Sorunome2014-02-11

Thanks Sorunome

hunter999 (author)2014-02-09

Wow! This nearly has as much white connectors as Metropolis!

Thanks Hunter, that is a very impressive ball machine

About This Instructable




Bio: Hello there I'm Zombiekiller-93 but me can call me Jay. I like making models of K'nex guns from the Call Of Duty games ... More »
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