Birds and Beans is the perfect little app for your DSi, and it's well worth the $2.
Gameplay: There are two games here: Pyoro 1 and 2. You have to unlock the second one by beating the high-score on the first.
Pyoro 1: You control the strange little bird named Pyoro, known for his insanely long toungue. Beans fall from the sky, and your job is to use your toungue to eat 'em up before they hit the ground--or you. If a bean hits the ground, that part of the ground will dissapear. If a bean hits your head, game over. If you eat a white bean it will restore a missing piece of the ground. Simple? Yes. Freakishly difficult? Hecks yeah. This game is no joke in the difficulty department. But it gives the game the "just one more try" factor.
Pyoro 2: Same concept as the first, what with the beans and all, but instead of eating them, you're spitting seeds at them. This one is a lot better than the first.
Bottom Line: Download it and never look back. It's the perfect mini-game for the DSi, and for 200 points, why wouldn't you?