When first beginning my search for the most AWESOME Halloween costume ever created, I first wanted to pick something I've always loved... this lead to my childhood amore for Transformers which eventually became my Magnus Opus or Optimus Prime to be exact. Once I had the idea I shared it with my family and thus began the endless nights, thousands of Glue gun burns and my invasion occupation of my living room. I unshackled the little geek in me and let him run buck wild 'til his heart's delight.

All together I spent about $40 - $50 bucks, finding most materials from what I had in my garage or around the home.

Things you'll need:
- Hot Glue Gun (and sticks - the bigger the bag the better)
- Duct Tape (Red, Gray)
- Masking Tap (Mainly for paint)
- Small Ruler and Big Ruler
- Exacto Blade
- Scissors
- Spray Paints (Primer, Red, Blue, white and Mettalic)
- $.99 cents store Mini Flashlights (4 of them)
- Hard HAt (about $6.00 at any Hardware Store)
- Velcro (Found at Major stores like Target, Kmart etc.)
- Lots and lots of cardboard, or foam board. Most companies throw out scrap or just go to your local markets and ask them to save you some before tossing.
- 2 tin cans (emptied of course)
- 2 plastic report sheet covers (for the windshields)
- I used old Hockey Gloves but any cheap canvas ones will work.
- Packaging tubes or PVC piping

Over the last month I've found myself staring at piles of trash while driving, hoping to find something I can use for my costume. Always try to be frugal and inventive.

Step 1: Creating the Head

Let start with the head.

First select an old bicycle, snowboarding, or hardhat helmet that you never plan on using again.

From the Cardboard or foamboard
- Cut 2 ear flaps (Triangle shape)
- Cut 1 center unit piece (Retangle Shape)
- Cut 2 side discs where you plan on attaching the 2 antennae. (circle discs) Antennae.

Like most of this project it will be a series of trial and error to make things fit, the ear flaps are no exception. Once you have your desired shapes cut out, you'll need to cut circles on the inside to affix to the helmet with hot glue. Adjust fast because the glue dries quick.

The Center unit will present the biggest challenge as the concave center will need to be cut out with your best estimate then refitted for additional cuts. Remember don't over guess because you can always take off more, but you can't regrow once cut. Take your time on this fitting, it will pay off in the end.

Finally as for the side discs, just cut out 4 identical round discs, then for interior spacing take small scraps of cardboard and stack them like pancakes. Identical in number so both discs are even. Sandwich the small scraps with 2 discs and glue in place. Wrap then glue with out rim with a thin strip that covers the sandwich space. While drying cut out 2 long strips which will be the antannae (equal length) then measure out there width on the strip part of the disc. Cut slats on the discs just big enough to fit the antannae then put some glue on the tips and insert in the hold. Attach to the outer flaps and you've got an Optimus helmet.

Prepare for Painting by taping open areas of fabric with masking tape and any plastic bags around the home. Primer first, then paint over with the blue color of your liking.

Thanks for the great instructable!
<p>My three year old wanted to be Optimus prime for halloween so I had to scale the costume down quite a bit. Thanks for the good design Idea!! He loved it and the family was impressed with what you can do with some cardboard and a bunch of hot glue:)</p>
Tacosmith, great job, especially since it had to be scaled down tremendously...really awesome.&nbsp; <br />
It was awesome using the ideas from this page and making changes to fit my sons size. It was a fun build and he's a happy kid.
<p>I really want to make this for Halloween of 2016. Before I do, though, do you have any estimation as to its total height for, say, a 6' tall male? I need to be able to fit through doors, both vertically and horizontally.</p>
<p>This was a great build. Had a lot of fun with it already and Halloween is still a week away. I made a few slight modifications here and there but primarily to the helmet so my face would be hidden using drywall repair screens so I could see through but no one else could see in. Thanks for the details on the build! </p>
My nephew wanted to be Optimus Prime for Halloween 2 years ago and we followed these instructions. We adjusted of course where needed because he was only four at the time, but the costume came out great! We have made his costume every year since this one. Thank you so much for the detailed instructions.
<p>Thanks for inspiring me in making an awesome costume. I had an idea and searched it up and was directed to your Instructable. I made a costume of my favorite Transformer, Silverbolt. I added LEDs though, just to make it coolsies. You can look at the project here https://www.instructables.com/id/Arduino-powered-Transformer-Costume-with-LEDs/.</p>
<p>that's awesome!</p>
<p>Dannyeurena, I think it's our duty to remind you how awesome your instructible still is and probably always will be! Many many thanks!</p>
i found this instructable back in 2010. very helpful thank you!!!
I know what I'm doing this year for Halloween, I don't care how old I am this is cool and I want to give it a shot
<p>Best costume for prime i have seen yet, thanks for the inspiration. Made a hot rodimus costume the year after i made my prime, then made my girlfriend a bumblebee for this year. Have won multiple contests since making them! thanks for the help and inspiration! </p>
<p>Thank you for taking the trouble to post this! 4 years later it was perfect for me and my boy!</p>
Just wanted to pop in and say that there are still people using this to make Prime. Mine will be used at comic con and is still not 100%. i've got a lot of detail to add, but decided to take it for a spin at a Halloween party, a costume contest, and to hand out candy to kids this weekend. He was a huge hit, and I actually got a standing ovation when I walked out for the costume contest. It has taken me roughly two and a half weeks so far and will probably take another week to finish up.
<p>The costume we made for our three year old son. A workweek.</p>
That is awesome! You did a great job
Me and my Dad are making an Optimus Prime costume for Halloween. This helped a bunch!
<p>I decided last year I wanted to be Optimus for Halloween (they were my favorite toys as a kid) so I found your instructions and set to work. I showed my 5 yr old nephew the plans and he decided he wanted to be that too! I had my work cut out for me. I didn't get it done as well as I would have liked as I ran out of time, but it was still fun and he was a hit at school and in the neighborhood! This year I am going to put some time into it to make it easier to walk and re-use it! cardboard, duct tape and hot glue gun was a success overall!! and pretty inexpensive. A million thank yous from us both for your great ideas and plans!!!</p>
<p>We made one according to your design, thanks for sharing:)</p>
<p>thanks for the inspiration.made prime for mcm comic con scotland.cheers</p>
<p>Thank you very much for the instructions - it short cut the learning process immensely. Not only did it inspire me, it kept me busy while I was in the transition for looking for work. I wore it at Supanova 2014 in Sydney yesterday and it brought so many smiles, it has further inspired me to be able to one day create my own future instructable! This amazing drawing was what I based my costume on, it took me every night for 6 weeks - a great challenge but well worth it.</p>
Greeting Dannyeurena,<br><br>I took on the challange of doing my own Prime using our Prime as a blue print. I wore it last weekend for our pop culture expo, Supanova in Sydney, Australia. I could only wear it for a short time but when I did have it on, I could not move without everyone stopping me for a pic.<br><br>Took me over 2 1/2 months to make and had to cram in the time in the end to get it done. Still needs a bit of work done but the result was epic!!<br><br>Thanks for the blue prints. Without them I don't think I would of got this done. The pic's are a shorten pic history. Enjoy.
That's awesome, this helped me a little. what did you put in the leg to keep it on you shin? foam board?
<p>Know its a bit late replying.... 2 years I think. lol! But I used thick foam on the legs and let it 'hug' the leg and prayed that gravity didn't take over. If I was to build it again, I think I would of used a different method. </p>
<p>Awesome instructions!</p>
Thanks for the inspiration, made my first Optimus costume, and blaster! This was a lot of cardboard carving , let me tell ya! And it's true glue gun burns freakin hurt! Lol!! But just wanted to say thanks for the pics and the info, made my Halloween fun!
Thanks for the great instructions. I had a blast making this.
I just want to say thank you so much for posting this awesome picture.. As you can see I made Optimus for my son who is almost 7. I didnt use any of the diagrams, etc.. I just went by looking at the picture of the finished product. And He won Best Handmade Costume this year. And If it wouldnt of been for the main picture you posted, I dont believe it would ever of come out as good as it did.. You had great detail, and all the right things. Again Thank you. Hearing him say &quot;I Love it sooooo Much, Thank you, you are the Best Mommy ever&quot; was worth all the time invested. Which was around 100 or so hours. Next year he wants to be an excavater.... LOL<br> <br> http://prntscr.com/21c2cv<br> <br> http://prntscr.com/21c2o2<br> <br> http://prntscr.com/21c2ts
Another one.... thanks for the tips and inspiration.
I'm wanting to build one. Where do I find the patterns? I can't find them anywhere
trying to build one now. Thanks for this build. Iam going to also build my son a halloween costume! I love G1 Prime!!!!
Just wanted to say great job! I'm starting on one myself. I'm making my out of EVA foam and it's going to have a war &quot;weathered&quot; look to it. You did a fantastic job man!
Ahh, so after a month of building, I was able to make this. I can't tell you how many pictures I took with people. It's SO awesome and fun to walk around in. With the added height of the feet and helmet, I stood just under 7' tall. And I took my little cousin trick 'r treating in it.
I like the suit. How did you make the gun?
Just wanted to thank you for this fantastic Instructable. I took on your design and with but a few added touches of my own won first price at a Halloween party. People loved it and I have you to thank. <br>Unfortunately it wasn't finished, still needed a few touches here and there, but still went down a great hit. <br> <br>Thanks again! <br>Doorstop
Thank you for taking the time to share all of your hard work with the rest of us. My 9 year old loved his costume so much! Thanks again :)
Awesome instructions! Took me every weekend for 2 months but I finally finished. Here is my Optimus! <br>
HEY!!!!! IM DONE. well almost! YOU ARE AWESOME!!! hey yesterday I went outside with optimus and a man walks up to me saying that he wants to endorse the product!! If you want ill give you his number!!
This is my Optimus prime costume so far!!
Hey I have been trying to make a Tranformers suit ever sense I was a very little boy! Thanks to you I can FINALLY fulfill my childhood dream. question how did you keep the legs (shins &amp; thighs) to stay on? I am having a little trouble
Thank you so much for posting this! I made my own Optimus costume based on yours, with a few adjustments for being a girl and having a different... torso shape. My work has a four night Halloween party type thing for little kids and I ended up wearing it four hours each night, mobbed by kids and several adults the entire time. <br>Just a warning for other Primes-to-be out there: I did have a problem with several of the kids thinking I was a Real Steel robot and trying to get me to fight by hitting or kicking me. The parents usually told them to stop but after a while I had to find a buddy to try and stop them before they got close enough to hit. (For most of them you can tell which ones are going to hit you but they're really smart about coming in from your blind sides.) After spending hours and hours working on this costume it was extremely frustrating having it get banged and torn up. Be sure and bring along repair supplies if there's going to be kids around.
I'm a guy from a robotics team and we're making this as our mascot. Helmet was easy but we're havin' trouble with the body. <br> <br>Tips would be nice <br> <br>Dimensions <br> <br>Anything that you could give us so that we can have an easier time building it. Thanks man, your great.
What if you used real mirrors on the chest instead of painting the mirror effect? I never actually watched transformers when I was a little girl, but this looks awesome... but I am assuming that those squares on the chest are mirrors or something?
Upon looking at your design I was wondering if you had demensions to follow at all?
Thank you soooo much for making this instructable! You totally made my halloween. We had sooo many people compliment us on it. &nbsp;I made this costume for my 4 year old who LOVES Transformers right now. I spent a month (off and on) working on it (probably could've finished it in a week but it was a busy month), anyway, last night (10/30) he says<br> <strong>&quot;ummmm, mommy, I think I want to be a Decepticon instead...&quot;</strong> Honestly! The little monster. LOL.<br> Once he put it on though, he was so psyched to be Optimus. I think he was just yanking my chain.<br> Here's a pic of our finished product at the end of our night.<br> I had to make some adjustments to accomodate a child, like making it lighter... waaayyyy lighter.<br> <br> For the shoes I only made the front halves and had them hinge directly onto the leg, so the shoe and leg were one big piece.<br> <br> The leg pieces I cut at an angle at the bottom to accomodate a natural stepping motion. Worn with light up shoes it actually added to the costume.<br> <br> I reinforced the folds on the inside with a finger swipe of caulk and it made the costume super sturdy on the folds.<br> <br> My windows were cut from an old calendar.<br> <br> I left out the sides of the torso because it added to much bulk to such a small frame. This really made it easy to slip on and off and because of the arm pieces you can't even tell the sides are missing.<br> <br> The shoulders are attached with tiny hinges so they move up whenever my son lifts his arms outward.<br> <br> <b>###&nbsp;</b>One thing I would do differently and something I would recommend for anyone making a costume like this for a small child is to make a template of the entire costume out of a very lightweight cardboard like a <strong>cereal box</strong>.<br> <br> Before you glue any of it together, trace and cut out the same pattern out of <strong>Foamies</strong> (pictured below)<br> You can find<strong> Foamies by the roll (36&quot; by 60&quot;) at craft stores like JoAnn Fabrics, Michaels, and Hobby Lobby for about $5</strong> when it's on sale or you use a coupon. Just buy the colors you need for your costume, in this case, red, blue, and white.<br> <br> With your glue gun, hot glue the foamies pattern <strong>ONTO</strong> your cereal box template (be sure to score your craft foam the way you would with your cardboard).<br> <br> Construct the entire costume in the same manner (glue foamies to card then assemble).<br> <br> Once it's done spray entire costume with a clear glossy spray.&nbsp;<br> <br> This will drastically take the weight of the costume down and it will add comfort and squirming room for kids that don't hold still.<br> I used the above technique on a different project so I know it works, I just wish I could've used it for this costume since cutting cereal boxes is so much easier than cutting stubborn cardboard LOL.<br> <br> Oh, by the way, the lights on the costume are reading lights from the Dollar Tree. The helmet was started from a camo/soldier helmet also from the dollar tree.<br> <br> Thanks again for this crazy awesome instructable.<br> :)
Thanks for the instructions. Here's what we did, Optimus and Megatron. I may post instructions on Megatron later.
I used a lot of the instructions on this page. It came out great! Thanks!!
Only one thing need be said now........AUTOBOTS ASSEMBLE!!!! This was an awesome DIY, hope to get it up and running soon. <br><br>Quick P.S. in Chemistry when we were looking at telephone poles, and discussing the functions of all the equipment, when Mr.Censored said,&quot;Do any of you know what a transformer is?&quot;<br><br> Before I could register what I was doing I raised my hand and said,&quot;Robots in disguise.&quot; <br><br>Also, when it was Halloween, my school allows costumes, I saw someone dressed up as Bumblebee, and when she sat down for lunch, TRANSFORMED INTO A CAR!

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