Trade the indicated number of Carnival Cards at the Fun Bazaar to unlock the corresponding bonus:

Any mini-game: 50 Carnival Cards at the Fun Bazaar's Mini-game Wagon
Board Sounds: 50 Carnival Cards
Board Related Carnival Figures: 30 Carnival Cards each
Carnival Figures: Buy at least one Carnival Figure
Carnival Parade: Buy at least one Carnival Figure
Character Voices: 50 Carnival Cards
Chomping Frenzy: 50 Carnival Cards
Credit Roll: 100 Carnival Cards
Heckling Sounds: 50 Carnival Cards
Mini-game Sounds: 50 Carnival Cards
Mini-game Related Carnival Figures: 30 Carnival Cards each
Moped Mayhem: 50 Carnival Cards
Puzzle Pillars: 50 Carnival Cards
Staff Record: 50 Carnival Cards
Star Carnival Related Carnival Figures: 30 Carnival Cards each
Table Menace: 50 Carnival Cards
Test For The Best: 50 Carnival Cards
Very Hard Difficulty: 50 Carnival Cards