Big dreams, small people, adorable outfits. Smiffys’ When I Grow Up costume ideas are all about letting kids dress as who they think they’ll be one day. Whether that’s a brave firefighter, a superstar doctors and nurses, a fearless astronaut or a chef who only serves nuggets. Perfect for school dress-up days, career days, nursery events, Book Day alternatives or everyday role-play, these kids’ career costumes make imagination the main event. They’re colourful, comfy and easy to recognise, so there’s no awkward “and what are you meant to be?” conversations.
From emergency services and science heroes to builders, vets, pilots and pop-culture professions, our range of When I Grow Up fancy dress outfits encourages creativity, confidence and a whole lot of pretend responsibility (results may vary). At Smiffys, we believe fancy dress should inspire big ideas, messy play and dreams that change daily. Today they’re a doctor. Tomorrow they’re a dinosaur. We support both.
Let Their Imagination Take the Lead
Whether your child dreams of saving lives, exploring space or running a five-star restaurant before bedtime, When I Grow Up fancy dress helps bring those ideas to life. For more ideas why not checkout our When I Grow Up Blog.
Shop by collection
Fireman Costumes
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Army Officer Costume -
Cop Costume, Kids -
Police Boy Costume -
Texan Cowboy Costume, Child, Brown & Black -
Camouflage Military Boy Costume -
WW1 Nurse Costume -
Doctor/Scientist Costume, Unisex -
Captain Costume, Child -
Cheerleader Costume, Child, Pink -
Nurse Costume, Blue -
Cowgirl Sweetie Costume -
Kids Unisex Navy Boiler Suit Costume -
Kids Unisex Red Boiler Suit Costume -
Surgeon Costume, Kids -
Army Boy Costume -
Kids Unisex Green Boiler Suit Costume -
Girls 70s Super Chic Costume -
Firefighter Super Soaker Kit -
New York Cop Costume -
Rockstar Glam Costume -
Top Gun Maverick Baby Costume -
Fire Fighter Toy Kit -
Top Gun Maverick Child's Aviator Costume, Green -
Toddler Racing Car Driver Costume