This shop offers a variety of cute children's wear for kids of different ages.

children's 是名词 child 的所有格形式，表示"儿童的"。 wear 在这里是名词，指"衣物、服装"，来自动词 wear（穿着）的名词化用法。 children's wear 指专门为儿童设计的服装，即"童装"。