How to Make a Baby Alien Costume | Soft & Simple DIY

A baby alien costume comes together with a green outfit, a decorated headband, and no small parts near your child.

Making a baby alien costume for your little one doesn’t require sewing skills or a stiff, store-bought shell. The smartest approach builds the whole thing from soft clothing your baby already wears, then adds a lightweight headband with oversized alien eyes and antennae. Whether you’re crafting a baby alien costume for Halloween or a themed photo shoot, the trick is keeping every piece baby-safe while still getting that classic extraterrestrial look.

What You Need for a DIY Baby Alien Costume

This costume comes together with a short list of craft supplies and soft clothing. Country Living’s DIY Alien Costume guide uses felt, styrofoam balls, a plain headband, and pipe cleaners for the headpiece — all materials you can find at any craft store.

• Plain headband (thin, lightweight, and comfortable)
• Styrofoam balls (small ones for the alien eyeballs)
• Felt sheets in dark green, light green, black, and white
• Pipe cleaners for the antennae
• Pom poms for the antennae tips (the source notes “any size or color will work!”)
• Low-heat hot glue gun and glue sticks
• Green T-shirt and pants, or a green dress

The base clothing matters as much as the headpiece. The guide suggests a comfy dress or a green T-shirt with pants for a low-stress version — exactly what a baby would wear on a normal day, just in green.

How to Build the Alien Headband

The headband is the star of this costume, and it takes about twenty minutes to assemble.

1. Cut circles from your felt sheets: a white base circle, a slightly smaller dark green circle, then a black pupil and a tiny white highlight on top.
2. Layer the felt circles together to form each eye, then set them aside.
3. Use low-heat hot glue to attach the layered eyes to styrofoam balls, covering the front of each ball.
4. Glue three eyeball-topped styrofoam balls to the center of the headband.
5. Cut two leaf-shaped green felt ears and glue them to the headband.
6. Hot-glue pipe cleaners to the headband between the ears and the eyeballs, then glue a pom pom to the tip of each antenna.

When the headband is done, it looks like a classic three-eyed alien perched on top of your baby’s head. Let every glued piece cool completely before letting the headband anywhere near your child.

Babies explore with their hands and mouths, so costume safety comes down to what can come off and where it ends up.

The Country Living tutorial uses hot glue for construction, but assembly and wearing are two different moments. Hot glue should only ever be used while the baby is in another room, and the finished headband should sit untouched until every piece is fully cool and firmly attached. Before each wear, tug gently on the eyes, ears, and antennae to confirm nothing is working loose.

The bigger concern is small parts. Wiggly eyes, loose pom poms, foam pieces, and exposed pipe-cleaner ends are all choking hazards if they detach from the headband. The source tutorial doesn’t provide infant-specific safety testing, so err on the side of caution: skip loose embellishments, trim pipe cleaners short, and keep the headband on only during supervised, awake hours. A lightweight headband is also essential — a heavy or rigid one will slide, tilt, or simply annoy a baby into tears before you get the photo.

Skip face paint entirely for babies. Some kid-costume tutorials use it, but none of the sources provide infant face-paint safety guidance, and a baby’s skin is far more sensitive than an older child’s. The clothing-plus-headband approach gives you the whole look without putting anything on their skin.

For the same reason, leave duct tape, cardboard, and hot-glued structures off anything that touches skin. Those materials belong on outer costume parts at best, and nowhere near a baby’s face or hands. If you would rather buy than build, our guide to the best baby alien costume options online covers the store-bought route.

The Finished Look

Dress your baby in the green outfit, settle the headband gently on their head, and the costume is complete. The green base reads as “alien” instantly, while the three-eyed headband does the heavy lifting. For a newborn, the headband may not stay put — a green onesie alone with a single antenna clipped to a soft hat works just as well.

Keep the whole costume to one headpiece and green clothing. No capes, no props, no shoes with tricky fasteners — just a comfortable baby in an unmistakably alien outfit that lasts through the evening.