DSiWare (Monday) - Art Style: BOXLIFE (500 points)
Retail (Tuesday) - Classic Word Games - Dawn of Discovery - Discovery Kids: Parrot Pals - Fashion Week Junior Designer - Little League World Series 2009 - My Healthy Cooking Coach - Overlord: Minions - Shin Megami Tensei: Devil Survivor - Transformers: Revenge of the Fallen (Autobots/Decepticons)
Tetris DS went out of print and went for stupidly high prices for a while. But I thought they made a new batch not all that long ago and fixed that. At any rate, if you want Tetris DS I bet I can find one for you locally at a normal-game price.
Space Ace roolz
For me, however, it was getting my first million on a Xenon pin when I was about eight years old or so. That, or the time I took an arcade's redemption game for a ton because a crossed circuit kept giving me credits.