There are 5 cups that each have 4 trax in Happy Tree Racers.
Track 1-1: Rabbit Circuit (A Race Track Shaped Like A Rabbit)
Track 3-2: Christina's Mansion
Track 3-4: Frosty Volcano (A Race Track Mixed With Fire & Ice)
Track 4-3: Stormy Shipyard
Track 5-3: Starlight Speedway (A Race Track Shaped Like A Star)
Characters: Cuddles, Giggles, Toothy, Petunia, Nutty and Flaky
Unlockable ones: Sniffles, Handy, Debby (the female bee with purple glasses), Russel, Mime, Lammy, Christina, Flippy, Disco Bear, Lifty, Shifty, Splendid & Splendon't (the one you unlock by unlocking the other 12)