The best inflatable alien costumes for kids are the pick-me-up designs: your child stands inside a bright green alien that looks like it has scooped them off the pavement, with a pair of dummy legs dangling for the full carried-off effect. They go on in seconds, hold their shape with a small built-in fan, and read clearly across a dark street, which is exactly what you want on Halloween night. Every inflatable design we make is checked against more than 30 measurements, so it fits the child it is bought for instead of swamping them.

This is one of our kids Halloween picks, so if you are still choosing a theme, start with our guide to the best kids Halloween costumes. Below we explain how the pick-me-up illusion actually works, then rank five real inflatable alien fancy dress costumes from our range, from the classic carried-off look to a full-body giant alien. We design and make our own costumes and run more than 500,000 quality checks a year on them, so the one that lands on your doormat matches the one on the page.

How a pick-me-up inflatable alien costume works

A pick-me-up costume is one outfit worn by one child that looks like two characters. Your child steps into the green alien legs and does up the suit, and a small fan tucked inside pushes air through the body so the whole alien puffs up around them in under a minute. The clever bit is the pair of stuffed dummy legs sewn onto the front: your child's real head and shoulders show through the middle, the dummy legs hang down where their own legs would be, and the alien's arms wrap across to sell the grab. From a few steps back it looks like the alien has lifted your child clean off the ground.

The fan runs off a small battery pack you switch on at the start of the night and off at the end, so there is nothing to inflate by mouth and nothing to keep topping up. Because the shape is held by air rather than padding, the costume is light to wear and easy to move in, and it packs down flat for next year. The same fan trick powers the rest of our inflatable range, including our inflatable dinosaur costumes for kids, so if the alien is a hit you already know how the dinosaur works.

The best inflatable alien costumes for kids, ranked

We have ranked these by how well the illusion lands and how much wear you get out of them, with a full-body option and a no-fan alternative at the end for younger children.

1. The classic carried-off look: the red alien pick-me-up

Kids inflatable red alien pick-me-up costume showing the green alien carrying the child with dummy legs dangling

Our top pick is the Kids Inflatable Red Alien Pick Me Up Costume, and it is the one that gets the double-takes. A bright green alien with big black almond eyes appears to have grabbed your child round the middle: their real face shows through in a red top, while the dummy legs and white trainers swing below as if they are being carried off. The pack is the inflatable suit with its built-in fan and battery holder, so there is nothing else to buy to get the look. It goes over everyday clothes, which means a warm layer underneath on a cold night is no problem.

2. The story-stealer: the alien and astronaut

If you want the costume that wins the school parade, the Kids Inflatable Alien with Astronaut Costume Pick Me Up turns the joke up a notch: here the green alien is carrying off a little astronaut, complete with a white spacesuit, a flag and a mission patch, with the astronaut's legs dangling below. It tells a whole story in one outfit, which is why children love explaining it at every door. Same one-piece build, same fan and battery pack, same quick on and off.

3. The original green pick-me-up

Kids green alien pick-me-up inflatable costume, the classic carried-off design

For the cleanest version of the classic, the Alien PMU Inflatable Kids is the straight green-alien carry, no extra props, just the costume and the reaction. If your child would rather stand out than blend in, there is also a silver alien pick-me-up that catches the light under a torch or a porch lamp. Both work the same way and suit a group, so a couple of friends can turn up as a small invasion.

4. Be the whole alien: the giant inflatable

Not every child wants to be the one getting carried off, and the Kids Giant Inflatable Alien Costume is for the child who would rather be the alien. This is a full-body suit that puffs up into a towering green alien, so your child is the one doing the looming rather than dangling. It is a bigger silhouette than the pick-me-ups, which makes it brilliant for photos and easy to spot in a crowd of trick-or-treaters.

Kids giant inflatable green alien costume, a full-body towering design

5. The no-fan alternative: the alien Morphsuit

Kids alien Morphsuit, a printed green second-skin costume you can see and breathe through

For younger children, or for anyone who finds a big inflatable a bit much, the Kids Alien Morphsuit gives the look without the air. It is a printed second-skin suit in our 125GSM-plus breathable spandex, the same fabric that made the original Morphsuit: your child can see out, breathe and even drink through it, while staying covered head to toe. It layers easily under a coat, packs into a pocket, and works as a base for years of dressing up, not just one night.

Built to be seen on a dark doorstep

Halloween is the one evening of the year when crowds of children are out walking near traffic after dark, and the figures back up the worry. A UK study published in the International Journal of Environmental Research and Public Health, drawing on national STATS19 road-crash records from 1990 to 2017, found that child road casualties on Halloween between 5pm and 6pm were 34.2% more likely to be killed or seriously injured than on a normal day. Being seen matters, and a big bright-green alien helps you do exactly that.

Child in a giant green inflatable alien costume highly visible under a streetlamp on a dark pavement

An inflatable alien is high-visibility by design: it is large, it is a colour nothing else on the street is wearing, and a giant or pick-me-up shape stands out under a streetlight far better than a dark costume. We would still add a strip of reflective tape and send a torch along for good measure. Because every pick here is essentially one piece, there are no loose capes or trailing hems to trip on between houses, which is one less thing for a parent to think about on the night.

Getting the size right and keeping it costume-ready

An inflatable forgives a lot, but the fit still decides how the illusion reads, so we measure for it. Every design clears more than 30 measurement checks against our kids size charts, so the age band on the label is one you can trust rather than a guess. Check the size guide on each product page against your child's height before you order, and if they sit between two ages, size up: there is room inside the suit for a jumper, and a touch of extra length never spoils a pick-me-up.

Care is simple, which matters for a costume that gets worn hard. The inflatable suits wipe clean, and the alien Morphsuit is machine washable, so a muddy doorstep or a dropped sweet is not the end of the costume. We are clear on every page about what is in the pack and what is not, because no unwanted surprises is one of the four promises we make on every order, and the worst time to discover a missing part is the night before. When you are ready, browse the full range of kids inflatable costumes and pick yours in time to try it on before the big night. We make your best times better.

Frequently asked questions

How does a pick-me-up inflatable alien costume work?

Your child wears the whole thing. They step into the green alien legs, and a small built-in fan inflates the body in under a minute. Their real head and shoulders show through the front, a pair of stuffed dummy legs hangs below, and the alien's arms wrap across, so it looks like the alien is carrying them off. The fan runs off a switchable battery pack, so nothing needs blowing up by mouth.

What age are inflatable alien costumes for kids?

Our kids inflatable aliens are sized by age band and checked against more than 30 measurements per design, so the fit matches the label. Measure your child's height against the size guide on the product page before ordering, and size up if they are between two ages so there is room for a warm layer underneath.

Can children see and walk in an inflatable alien costume?

Yes. The child's own face is clear of the costume on the pick-me-up designs, so they can see, talk and trick-or-treat as normal, and their real legs do the walking inside the alien legs. The suits are held up by air rather than padding, so they are light to move in. The fabric alien Morphsuit is the see-out, breathe-through option for younger children who would rather skip the fan.

Are inflatable alien costumes warm enough for a UK Halloween?

They go straight over everyday clothes, so a jumper or a base layer underneath keeps your child warm without changing the look. We size with that in mind, which is why we suggest sizing up between two ages. For a cold, wet doorstep, the one-piece shape also means no gaps to let a draught in.

Do you need batteries for an inflatable alien costume?

Yes, the fan that keeps the costume inflated runs on a small battery pack, so it is worth having spare batteries in for the night. Check the battery details on the product page before the big night, switch the fan on to inflate, and off when you are done. The alien Morphsuit needs no batteries at all, as it is a printed fabric suit.