A dragon party does not need a single bought item. It needs a den, some gold-painted rocks, and permission to roar.
A blanket over a table, or a sheet pinned across a corner of the room, becomes the dragon's cave for the afternoon. Children arrive, crawl in, and the party already has a home base — which matters more for a party's pacing than almost any activity you plan.
Spray-paint or foil-wrap a bowl of stones, or use gold-coloured chocolate coins, and hide them around the garden or room for a "treasure hunt for the dragon's hoard". This is the same egg-hunt mechanic as Easter, renamed, and it works exactly as well.
A roar contest — loudest, scariest, funniest — sounds like nothing on paper and reliably becomes the moment children talk about afterwards. It costs nothing and takes two minutes.
A generic dragon — wings, scales, treasure, a cave — carries no ownership. Naming or dressing as a specific dragon from a film or show is a different thing and is worth avoiding.
Painted stones or balloons filled with small toys and confetti both work as "eggs" and need no special skill to make.
Part of our guide to Birthday party for one obsession.