After telling her dog Banana about her loose tooth and discovering that some of her friends do not believe in the Tooth Fairy, Anna makes an impulsive bet with a pesky boy who also has a loose tooth.

Furious that her twin brother, Cypselis, promised her as a slave should he lose a footrace, Ellie must find a way for tortoise-slow Cypselis to beat his classmate to the finish line at their school in ancient Greece. Includes facts about the Olympic Games.

When Catwoman and Harley quarrel about who is the best burglar, they decide to settle it with a bet: who can steal the fabled Marble of Atlantis from the Gotham City Antiquities Gallery; but Catwoman cheats (in fact she already has the pearl), and Harley has to move fast to outwit her rival and win their bet.