How old are all the kids from the goonies?

In "The Goonies," the main group of kids ranges in age from around 11 to 14 years old. Mikey Walsh is the youngest at 11, while his older brother Brand is about 16. The other members, such as Chunk and Data, are generally around 12 to 13 years old. These ages contribute to the film's themes of adventure and coming-of-age.