Goo goo, ga ga, da da da da. Hee hee hee.
4 seconds sound clip from Snagglepuss - Diaper Desparado (S1E13).
You can hear this line at 00:06:40.778 in the Blu-ray version of the episode.
Quote context
[...]
- Sufferin' catfish. What happened?
- Telegram for Snagglepuss. Telegram for Snagglepuss.
- I have a telegram for you from town jail.
- Goo goo, ga ga, da da da da. Hee hee hee.
- Heavens to papa. I'm apparently a parent.
- What ho, sheriff of Nottingham?
- 'Tis I, Robin Hood. He who robbeth from the richeth, and giveth to the pooreth.
[...]