Memory:

Talk 40 times your first cousin (20st unlocks aunt)

You will unlock the Nintendo DS and the memory game.

Jump&Catch:

After unlock Memory, Talk 20 times your first cousin

You will receive the Jump&Catch game.

Kitty race:

You have to unlocked Memory and Jump&Catch,

You need receive a baby hamster. (Cheat "how to make baby hamster")

After gived a name your new hamster, the first cousin will come:

He (She) ask his hamster and your new hamster will be the partners, click "Yes".

You will come to female hamster who she gives the baby hamster.

Go to the New hamster's cage and talk your first cousin.

(If you don't receive the Kitty Race!, talk 20 times your first cousin.)

You will receive the Kitty Race! game.