Baby Halloween Costumes DIY 2026: 5 Nap-Time Builds

If: You want the costume that survives the meltdown

The pick: Baby Dinosaur

Green hoodie, felt spikes down the back, stuffed tail. Twenty minutes, $3 to $8, no sewing.

A hoodie costume means zero complaints about itching or slipping, and it layers over whatever they are already wearing. The spikes attach with tape and safety pins, verified no-sew.

Real numbers: 20 min - $3-8 - Easy

If: It is baby's first Halloween

The pick: Baby Pumpkin

An orange onesie and green felt leaves. Twenty minutes, $3 to $8, no sewing.

The canonical first costume: warm, soft, and finished in twenty minutes. The onesie is the whole base, so sizing is already solved.

Real numbers: 20 min - $3-8 - Easy

If: The baby runs warm and cozy

The pick: Fuzzy Monster

A pastel fuzzy footed sleeper with giant googly eyes and an oversized stitched smile. Fifteen minutes plus drying, $8 to $15, no sewing.

Ugly-cute is the whole point, and on a footed sleeper it is literally pajamas. Size the eyes big so they read from the sidewalk.

Real numbers: 15 min + drying - $8-15 - Easy

If: You have 15 minutes and a paper bag

The pick: Little Baker

A paper chef hat and an apron tied over a onesie. Fifteen minutes, $2 to $5, no sewing.

The hat is one paper circle away and the apron ties over whatever they have on. The toy whisk is optional; the hat is the costume.

Real numbers: 15 min - $2-5 - Easy

If: You are trick-or-treating after dark

The pick: Glow Skeleton

Black footed sleeper with glow-in-the-dark bone tape and glow bracelets. Twenty minutes, $5 to $10, no sewing.

Spooky after dark and visible to cars, which parents love. The tape goes on the sleeper; nothing touches the skin.

Real numbers: 20 min - $5-10 - Easy

Formula: Sleepy owl

Brown footed sleeper. Hot-glue rows of felt feather scallops down the front, then glue two big sleepy eyes to the hood. Nothing on the face at all; the hood does the work.

Formula: Cotton-ball sheep

White onesie. Hot-glue cotton balls all over the torso, then glue two black felt ears to a soft headband. Skip the headband if they pull it off; the cotton-ball onesie reads sheep on its own.

Formula: Strawberry

Red onesie. Hot-glue a green felt leaf collar around the neck and dot yellow felt seeds across the front. The collar is the whole costume; the seeds take five minutes.

The pick: Baby Dinosaur

Real numbers: 20 min - $3-8 - Easy

You will need:

1. Green hoodie, 1 (buy: clothing store, or use your own)
2. 2 sheets green craft felt, 9x12 inches each (buy: craft store, construction paper works too)
3. Pillow stuffing or 2 old socks (make: stuff from home)
4. Safety pins, 6 to 8 (buy: dollar store)
5. Masking tape, 1 roll
6. Scissors, 1 pair

1. Cut a paper triangle template first and test the size on the hoodie.
2. Then cut 6 to 8 triangle spikes from the green craft felt with the scissors, spikes cut too small look lost on the back, so go palm-size.
3. Tape the spikes in a row down the back of the green hoodie with the masking tape. Pin each spike from inside the hoodie with a safety pin.
4. Stuff the old socks with the pillow stuffing and tape the open ends shut with the masking tape.
5. Safety: pin everything from inside the green hoodie, so pin backs face the fabric and never the skin.
6. Pin the stuffed tail to the back waistband of the green hoodie.
7. Optional pro finish: cut two small white felt triangles and pin them to the hoodie cuffs as claws. Claws sell the dinosaur more than the spikes do.