When I Grow Up Costumes Ideas

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.

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What is a When I Grow Up costume?

A When I Grow Up costume allows children to dress as a future job or role, such as a doctor, firefighter, astronaut, builder or chef.

What are popular When I Grow Up costume ideas for kids?

Popular choices include emergency service costumes, medical roles, astronauts, builders and other easily recognisable careers.

Are When I Grow Up costumes suitable for school events?

Yes. These costumes are ideal for school career days, nursery dress-up events and educational role-play activities.

What age are When I Grow Up costumes suitable for?

Most When I Grow Up costumes are designed for toddlers, preschoolers and primary school-aged children.

Where can I buy When I Grow Up costumes in the UK?

Smiffys offers a wide range of kids’ When I Grow Up costumes with fast UK delivery.