Dexter's mom takes him to his grandpa's house. At first he thinks it's going to be a boring day until he discovers that his grandpa has a secret lab!
| Title | The Grand Daddy of All Inventions |
|---|---|
| Genres | Animation Comedy Sci-Fi & Fantasy |
| Release Date | 2001-11-30 |
| Episode Runtime | 00 Hours 07 Minutes |
| Season Number | 3 |
| Episode Number | 9 |
| Production Companies | Hanna-Barbera Productions, Cartoon Network Studios |
