Looking for an easy, affordable and totally radical costume idea for you, your whole family or a friend group? Whether you’re headed to a Halloween party, cosplay event or just want to show off some turtle power, this DIY cowabunga crew costume has your back. The best part? It’s made mostly with thrifted finds, including a genius turtle shell hack using a roasting pan. Yes, you read that right.
Let’s dive in and make your childhood heroes in a half shell come to life — DIY style!
Step 1: Thrift the Base Outfit
Start your transformation by hitting up your local Goodwill® stores. You’re looking for:
- A green top (It can be a t-shirt, hoodie or long sleeve shirt.)
- Green pants or leggings
- Old-school sneakers (Any comfy pair will do, but bonus points if they’re a bit retro.)
This base will give you the right silhouette to start without breaking the bank.


Step 2: Pick Your Turtle
Before you accessorize, it’s decision time. Which member of the cowabunga crew are you?
- Red and Sai – Bold and brash
- Orange and Nunchaku – Fun and chill
- Blue and Katana – The leader
- Purple and Bo Staff – The tech genius
Once you choose your turtle, grab ribbon or fabric in the turtle’s signature color to use for your mask, arm/leg bands and belt accents.
Step 3: Make the Turtle Shell (This is the Cool Part)
Since you can’t just thrift a turtle shell (although you never know what you’ll find at Goodwill), this is where you’ll need to get creative. But don’t worry, this isn’t a complicated craft. Anyone can do it.
Supplies You’ll Need:
- One large disposable aluminum roasting pan (for the shell shape)
- Light green spray paint
- Dark green spray paint
- Thick black Sharpie or black paint pen
- Ribbon or elastic (for straps)
- X-Acto knife
- Hot glue gun and glue sticks
- Newspaper or tarp (for spray painting)

Shell Crafting Steps:
- Spray it down:
Lay the roasting pan upside down on a tarp or newspaper. Spray both sides with light green spray paint and let dry. - Add depth:
Once dry, go in with the dark green spray paint on the outer part of the shell. This adds that cartoon-style dimension. - Detail the shell:
Use your black Sharpie or paint pen to draw in the turtle shell pattern on the outside —think hexagons or rounded shapes, like a tortoise shell. - Strap it up:
Use the X-Acto knife to cut four small slits — two on top, two on bottom — where your ribbon or elastic will thread through. - Secure the straps:
Thread through your green ribbon and secure the top straps with hot glue to prevent slipping. Leave the ends long so you can adjust and tie or pin them in place later.








Optional Add-Ons (If You Want to Level Up)
If you’re really ready to go all-out, you can add in a few extra elements to your costume:
- Foam or cardboard “weapons” (sais, nunchaku, katanas, bo staff — depending on your turtle)
- Face paint or a colored bandana mask
- Brown belt to tie around the waist
- Elbow/knee pads
Step 4: Turtle Time!
Once your costume is complete, throw on your gear, strap on that shell and get ready to party like it’s 1987. Whether you’re trick-or-treating, hitting up a costume party or just vibing with friends, this look is guaranteed to bring in compliments — and possibly a few high-fives from all the 90s kids.
Cowabunga, dudes!