The BEST puzzle game for DS. Period.
The levels start off amazingly simple, but get progressively harder until you're almost ripping your hair out with frustration. But it's not the frustration of being stuck and not knowing what to do, but the kind that goes with genuinely difficult puzzles and makes you strategize.
The basic idea is to match up the top numbers with the side numbers. It's hard to explain here, but you'll get the basic idea very quickly. The completed drawings make little pictures, and if you get it done just perfectly, the pictures come to life with color and animation. There are two bonus levels to achieve, too, as well as extra time races to unlock. This game will keep you busy for hours, and at $19.99 (U.S. dollars), it's a wonderful bargain for puzzle lovers.
The only "problem" is there is no replay value. Once you've unlocked all the pictures and time trials, there's nothing left to do but try to resell the game. But it will take you so long to get through all the puzzles that this is not a major issue.