noun
kid's meal; children's lunch set
A set meal for children, typically served on a special plate with a flag, often found in family restaurants or hotels in Japan.
レストランでお子様ランチを注文した。
I ordered a kid's meal at the restaurant.
お子様ランチにはおもちゃが付いてくる。
A toy comes with the kid's meal.
Compound of お子様 (honorific for 'child') + ランチ ('lunch'). The exact origin of the set meal name is uncertain, but it became popular in Japanese family restaurants in the mid-20th century.