The kid's party hat is a headgear item used by kids for celebrating parties. The Pip-Boy 3000A categories the kid's party hat as an apparel item. The kid's party hat is a red paper hat with blue streamers. There is an adult version of the party hat. Kid's party hats are used in Vault-Tec Vaults.
On July 13, 2268, Amata Almodovar brings four hats to Vault 101's cafeteria in anticipation of her friend's tenth birthday party. During the party, they can wear the kid's party hat. If the Lone Wanderer speaks with Wally Mack, he will express his scorn for the party, pointedly singling out that kid's party hats and balloons are for younger kids. (This is more telling of Wally's attitudes towards the Lone Wanderer than a reflection on the party. Wally is younger than the Lone Wanderer.)
- Vault 101 cafeteria
A party hat appears in the Point Lookout hallucination beside your mother's skeleton.