Fall Halloween. October 14th, 2025

25 Adorable DIY Baby Boy Halloween Costumes & Outfits

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Halloween is a magical time for parents—especially when it’s your baby’s first or second one! Instead of buying an expensive costume that’s only worn once, why not make your own? We’ll explore DIY baby boy Halloween costume ideas that are budget-friendly, comfortable, and irresistibly cute. Whether you’re crafting a tiny superhero, a cuddly animal, or a classic pumpkin, these projects will make your little one the star of the night.

You will find charming baby girl Halloween costumes and outfits.

Tip: Use breathable cotton or fleece materials so your baby stays cozy and safe during festivities.

Let’s get started with the Halloween costume ideas:

Baby Boy Halloween Costumes

These ideas are best Halloween costumes for baby boys. However, some of these are gender neutral and even baby girls will look adorable in them. Use fabric glue for easy DIY if sewing is not your preference.

Popular DIY Baby Boy Halloween Costume Ideas

1. Baby Pumpkin Costume

A timeless favorite! Use an orange onesie, green felt leaves, and a little hat stem. Add soft stuffing for a rounded pumpkin look.

2. Mushroom Halloween Costume

A cute gathered circle hat with dots as mushroom and a tiny caterpillar on the tshirt.

3. Baby Superhero Outfit

Transform a plain onesie into a hero suit using felt emblems and capes. Choose popular characters like Superman, Batman, or create your own mini superhero identity.

4. Baby Lion Costume

This is the cutest lion ever! Attach yarn or felt strips around a brown hoodie to create a fluffy mane. Add soft felt ears and tail for a cuddly jungle look.

5. Baby Astronaut Costume

Use a white sleeper, add NASA-style patches or stickers, and make a “helmet” from soft fabric or felt. A fun idea for space-loving families!

6. Baby Scarecrow Costume

Pair overalls with a plaid shirt and attach straw-colored yarn at the cuffs and collar. Use face-safe paint for stitched-on smile details.

How to make a scarecrow that stands out ideas

7. Baby Skeleton Pajamas

Use glow-in-the-dark fabric paint or iron-on vinyl to create bones on a black onesie. Cute and spooky!

8. Baby Dinosaur Outfit

Sew or glue colorful felt spikes down the back of a green hoodie and pants set. Add mittens and booties for a roaring finish.

9. Halloween Dragon Costume

Loving the felt scales added to the vest and the little wings on the back.

10. T-Rex Halloween Costume

A DIY dinosaur costume for toddler will look cute on a baby boy with stick-on polyester filled tail.

Easy DIY Baby Boy Halloween Costumes

These ideas are quick to assemble, often using clothes you already own, making them perfect for busy parents looking for a last-minute baby boy costume.

11. The Tiny Lumberjack

A cozy and classic choice that’s all about layering. Dress your baby in the jeans and flannel with drawn-on felt beard. For a fun accessory, you can use brown felt to create a small foam-filled “axe” (ensure no sharp edges, safety first!). This is a great warm baby boy costume idea.

12. Gnome costume

Add a beard and hat piece, simply stitch them together from the sides for convenience.

13. Baby Yoda (Grogu) / The Mandalorian

A viral favorite that’s surprisingly simple to create. Wrap your baby in the tan or beige fabric/blanket to resemble Grogu’s robe. Attach large felt ears securely to the green beanie. If you have a brown carrier or wrap, that instantly completes the look!

14. Duck in a Pond

A creative, DIY baby carrier costume that keeps your little one snug. Securely glue the rubber ducks to the top edge of a blue shirt you are wearing or a fabric panel placed over the baby carrier. Dress your baby in a yellow/orange outfit or beanie to complete the “duck” look.

15. Little Baker/Chef

An instantly cute and easy costume for all ages. Dress your baby in the onesie and hat. Wrap the dish towel around like an apron. For a funny twist, you can safety pin a small whisk or wooden spoon to the apron.

16. Classic Gumball Machine (No-Sew)

A bright, colorful, and fun option. Glue the colorful pom-poms (the “gumballs”) all over the white onesie. Cut a small, rectangular piece of gray felt for the “dispenser” and secure it near the bottom of the shirt. Ensure pom-poms are securely fastened to prevent choking hazards.

DIY Costumes for Baby’s First Halloween

When choosing a baby boy first Halloween outfit, focus on maximum comfort and minimal fuss. Newborn costumes should prioritize diaper access and soft, non-irritating fabrics.

17. Potted Plant Flower

Attach large, green paper/felt leaves to the neckline. Place baby in a soft fabric bucket or basket wrapped in brown paper (the “pot”). Keeps baby stationary and cozy. The “pot” acts as a great photo prop/stroller cover.

18. Mini Mummy

Wrap strips of white fabric or gauze around the arms and legs (not too tight) on white onesie base. Uses soft, breathable material. Crucial to ensure no loose ends or strangulation hazards.

19. Cat costume

A gender neutral cheshire cat from Alice in Wonderland.

20. Warrior Costume

The spartan baby Halloween costume.

21. Popcorn costume

This popcorn carrier cover would be perfect for a newborn/ infant baby boy or a girl.

22. Bear Costume

Easy costume ideas like this cuddly baby bear costume.

23. Sushi costume

Make Halloween baby costume out of onesie.

Creative Boy Halloween Costumes

24. Pirate costume

Probably the easiest costume from the closet ever Baby pirate costume.

25. Chicken costume

I see a cute little chicken walking down the street with body of the chicken using DIY tulle.

26. Baby Minion costume

Oh my gosh! Isn’t this the most adorable minion ever from despicable me.

27. Dr. Seuss Costume

Another easy costume idea for boys with a bow and a hat.

Baby Cat in the Hat costume

28. Football costume

Easy DIY Football Themed Halloween Family costumes

29. Harry potter costume

An adorable costume with glasses, house scarf, and a lightning tattoo.

30. Hedgehog Costume

A girl’s hedgehog costume works great for both genders.

31. iPhone costume

Last-minute simple no-sew iPhone costume made from t-shirt.

32. Baby marshmallow costume

An oversized dress as marshmallow.

33. Elmo costume

This no-sew red frill costume is so easy to make.

34. Snowman costume

This Olaf Snowman costume from Frozen.

35. Penguin costume

Cute penguin from Mary Poppins costume.

36. Pinocchio costume

37. Cat in the hat costume

Adorable thing 1 and thing 2 costume perfect for baby twins.

38. Einstein costume

This easy costume will look great on a baby. All you need is a lab coat, hair wig and mustache piece.

39. Baby Owl Costume

Make this cute Bat or masked owl costume with templates from Martha.

Last-Minute Baby Boy Halloween Outfit Ideas

If you’re short on time, try these fast and easy ideas with fabric glue:

Baby Ghost: White onesie + black felt eyes and mouth = instant ghost!
Baby Bumblebee: Yellow onesie + black stripes + pipe cleaner antennae.
Baby Chef: White bib, paper chef hat, and a toy spoon.
Baby Monster: Bright hoodie + felt eyes + toothy grin cutouts.

I hope you enjoyed these cute, adorable and easy baby boy Halloween costumes.

How to Make a DIY Baby Costume Safely

Safety is key when dressing babies for Halloween. Follow these quick tips:

Avoid small parts like buttons or beads that could be choking hazards.
Skip face masks—use soft headbands or hats instead.
Choose flame-resistant fabrics for any costume.
Keep it breathable: Babies can overheat easily, so stick with light layers.

Common Questions About DIY Baby Halloween Costumes

1. What are the easiest DIY baby costumes?

Pumpkin, ghost, and animal onesies are the easiest since they use minimal materials.

2. How do you make sure the costume is safe?

Use breathable fabric, avoid sharp edges or small attachments, and always supervise your baby.

3. Can you make a costume from regular baby clothes?

Absolutely! Use onesies, pajamas, or hoodies as the base and decorate with felt, fabric paint, or accessories. Safety and Comfort.

4. What is the most important consideration for a baby’s Halloween costume?

A baby’s costume must be made of soft, breathable, non-irritating fabric (like 100% cotton or fleece). It should be loose enough to allow movement, but not so baggy that it becomes a tripping or entanglement hazard. Always check for secure, non-removable small parts that could be a choking risk (e.g., small buttons, sequins, or unsecured googly eyes).

5. What’s the best time to make the costume?

Start a week before Halloween to allow time for drying paint, sewing, or small adjustments.

6. How can you ensure your DIY costume is safe for a car seat?

Avoid bulky layers and attachments. Never strap a baby into a car seat while wearing a costume with thick padding (like bulky animals or snowsuits), as this prevents the harness from being properly tightened. Choose a costume that can be worn over the harness, or simply use the costume as a theme for the regular clothes the baby wears in the seat.

7. What is a good no-sew, warm costume for a chilly Halloween?

Costumes that start with a fleece sleeper or hooded sweatshirt are ideal.

Popular Choices: A simple Monster (add felt “spikes” or “eyes” with fabric glue), a Bat (cut out black felt wings and attach them to a black sleeper), or a Lamb/Sheep (glue cotton balls or fleece scraps to a white outfit). These choices allow for layering underneath regular clothes.

8. Should you use face paint on your baby?

No. Dermatologists and pediatric safety guides advise against using face paint or makeup on infants and young toddlers, as their skin is highly sensitive. The costume should be recognizable without the need for facial alteration.

9. How do you make sure a DIY costume allows for easy diaper changes?

Choose a onesie or sleeper with snaps at the bottom as your base. Any costume embellishments (like the “pond” for the duck or the “gumballs”) should be applied to an outer layer (like a separate vest or t-shirt) that can be easily removed, leaving the basic snap-crotch onesie for quick changes.

Creating your own DIY baby boy Halloween costume is a fun and rewarding project that lets you celebrate creativity and make lasting memories. Whether you choose a simple pumpkin or a unique space explorer, your handmade touch will make this Halloween unforgettable.