No-Sew Kids Ninja Costume

Who out there loves a good no-sew Halloween costume idea? I know I do! I created this no-sew Kids Ninja Costume for a Ninjago party I hosted for my youngest son’s birthday last year. I have been meaning to share those party photos with you for… well, a year! I promise we will put them up soon, but I didn’t want to wait any longer to share our fun DIY Ninja Costume tutorial because it would make a super-easy and inexpensive Halloween costume.

This ninja costume is so easy I made enough for all the kids coming to my sons party in one evening!

You need absolutely no sewing to whip up this easy kids ninja costume — basically all you need is a good, sharp pair of scissors. This ninja costume is so easy I made enough for all the kids coming to my sons party in one evening! If you’re after an easy no-sew Halloween costume, you’re seriously looking at less than 10 minutes of work to make this kids ninja costume, and it’s definitely going to feel like a #SupermomMoment when your little ninja dude tries on his DIY ninja costume for the first time!

Easy Kids Ninja Costume Halloween - no sewing required to make this ninja outfit

Easy Kids Ninja Costume Tutorial

To make a kids ninja costume, begin with a set of inexpensive sweatpants or leggings and a matching long-sleeve t-shirt. (I picked up Harrison’s at Walmart.) IMPORTANT: you will want a looser fit so get a long-sleeve shirt a couple sizes larger than your child actually wears.

Here’s how to make the components of this ninja outfit:

  • FOR THE NINJA BELT: I cut a 3-inch wide strip of black felt. (You can also buy felt at Walmart in the fabric section.)
  • FOR THE NINJA KIMONO TOP: place the t-shirt on a flat surface and using sharp scissors cut straight up the front middle of the shirt. Now take the right flap and about six inches from the top, cut at a slight angle up to the collar. Repeat for the left flap and then cut the collar off completely. Cut off the cuff on each of the sleeves, and you’re done!
  • FOR THE NINJA PANTS: this is the super-easy part! If you have sweat pants with a gathered cuff you can consider cutting the cuff off. Otherwise just wear them as is.

Kids Ninja Costume Tutorial - no sewing required!

Easy Boys Ninja Costume Halloween and DIY Ninja Nunchuks and Ninja Staff Tutorial

I know I’m biased, but I think Harrison makes the cutest little ninja! We’re showing this as a boy ninja costume but of course this would be perfect for girl ninjas too!

Your ninja outfit is almost there, but I am guessing now your little ninja is going to want some good ninja weapons.

Kids-Safe Ninja Costume Weapons

To complete your Kids Ninja Costume, pick one of these fun and kid-safe DIY ninja weapons. Harrison posed here in his ninja costume with our easy DIY Ninja Staffs made using a very similar technique to the Easy Kid Nunchuks shown below. At our Ninja party we made each of our kid ninjas their own set of these kid-friendly DIY Nunchucks.


While both of these pretend ninja weapons are padded for safety, please be sure to instruct your kids how to safely use them before playing.

  • The DIY Ninja Staff is definitely safer than a REAL ninja staff, but of course you’ll want to make sure your little Ninja doesn’t take a good swing at anyone because it’s not exactly going to feel good. We think the Ninja Staff works better for the Halloween Kids Ninja costume where there won’t be lots of ninjas tempted to really duke it out. We used a couple ninja staffs at our ninja party for a controlled, joust-style party game, rather than making one for every guest — that just seems to be asking for trouble!
  • The DIY Nunchuks have nothing rigid inside the padding so the kids can have more leeway with those. Barring a good whack in the eye, they won’t really do any damage. They are so easy to make we let every kids have a pair and they got to decorate their set with washi tape.

Kid-friendly Foam Nunchucks tutorial for Boys Ninja Costume at

Ninja Nunchuks & Ninja Staff Tutorial

TO MAKE KIDS NINJA NUNCHUCKS you will need two, 8-inch pieces of foam pipe insulation and one 10-inch piece of 3/4-inch rope (this will make one set of kids nunchucks). We purchased the supplies at a home improvement store. It is a good idea to burn the ends of the polyester rope to keep from fraying. Hot glue one end of the rope approximately one-inch inside of the insulation tubing. Repeat with the other end of the rope and piece of insulation. Let your little ninja decorate the nunchucks with washi tape.

TO MAKE A DIY NINJA STAFF you’ll need a 3-foot length of 3/4 PVC pipe or 3/4-inch dowel (whichever is cheaper) and 3-feet of foam pipe insulation. Wrap the insulation around the pipe as intended, you can buy self-sealing pipe insulation to keep the foam in place or use a hot glue gun to shut it. Use yarn to wrap a hand grip area at the middle of the staff.

More DIY Halloween Costume Ideas for Kids

Want more easy kids Halloween Costume ideas? Here are ten more DIY costume tutorials that your kids will love…

  1. Teenage Mutant Ninja Turtles Inspired Costume
  2. Harry Potter Golden Snitch Inspired Costume
  3. Handmade Monster Costumes
  4. Star Wars Inspired Costumes
  5. Boy & Girl Mummy Costumes
  6. Tutu Cute Cupcake Costume
  7. Adorable Dice Box Costume
  8. Little Mermaid & Flounder Inspired Costumes
  9. Sharkboy & Lavagirl Inspired Costumes
  10. Plants vs. Zombies Inspired Costume


Contributor at Paging Supermom
Aimée was a co-founder of Paging Supermom. Although she dreams in pink, she wouldn’t trade her two energetic boys for anything. Between using The Force on surrounding battle droids and flying to infinity and beyond, Aimée enjoys squeezing in some personal creative time. With a background in advertising, marketing and design, she is proud to stay home raising her boys.

13 thoughts on “No-Sew Kids Ninja Costume”

  1. P.S. I came over from a link at snapcreativity where I was reading about the jquery pin it button.

    Ironically, I tried to use the hover Pin it button to put one of the ninja photos on my new Pinterest board, and it comes up blank and says I have to add a photo to pin…


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