I just saw Spy Kids 2, The Island of Lost Dreams. It is really similar to the 39 Clues.
- Carmen (Amy) likes Gary (Ian) who has a sister, Gerti (Natalie), while Carmen (Amy) has a younger brother, Juni (Dan).
- They are on a quest for the Cloaking Device (Cahill Serum).
- The bad guy is one of the antogonists' parents. (Isabel and Donnagan).
- Carmen (Amy) denies her crush on Gary (Ian) to Juni (Dan), who makes fun of it.