The original:
- Those Two Actors:
- Tommy Kirk and Kevin Corcoran (Wilby and Moochie respectively) had previously starred together in Old Yeller as Travis and Arliss Coates (and would go on to star in Swiss Family Robinson together).
- Fred MacMurray and Tommy Kirk also went on to star in The Absent-Minded Professor as Professor Ned Brainaird and Biff Hawk.
- Annette Funicello and Roberta Shore previously appeared as rivals in the Annette serial on The Mickey Mouse Club.
The 2006 remake:
- Star-Derailing Role: This and the failure of Zoom: Academy for Superheroes was this for Spencer Breslin.
- Those Two Actors: Spencer Breslin plays Tim Allen's son, in the second of four movies they both appeared in (the other three include The Santa Clause 2: The Mrs. Clause, Zoom: Academy for Superheroes, and The Santa Clause 3: The Escape Clause).
