|Air date||February 15, 1973|
|Season||Season 4 (1972-1973)|
- Big Bird decides to become a famous inventor.
- "Three of These Kids" (barbels)
- Film: A scuba diver collects shells, which some kids count in voice-over.
- Three monsters (Billy, Fenwick, and Pamela) demonstrate 'big,' 'bigger,' and 'biggest.'
- Cartoon: H - Horse
- Bill Cosby does a cameo
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|Episode 0473||Episode 0475|
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