From Homestar Runner Wiki
A kiddie pool has shown up from time to time in the Homestar Runner universe. It is used to represent a different location in each of its appearances. In Dangeresque 3: The Criminal Projective, Strong Bad says that the shark pond set can double as "a lava pit, a pie factory, a piranha sandwich and a cursed kiddie pool".
- Email stunt double (Pie Factory, Shark Pond)
- Email monument (Pie Factory)
- Marzipan's Answering Machine Version 14.2 (Easter egg) (Quicksand)
- Dangeresque 3: The Criminal Projective (Shark Pond)
 Photos of Kiddie Pools