I was browsing the new Nintendo Channel, when I came upon this in the new releases.
Linky.
Firstly I would recommend you go and watch the video on the Nintendo Channel. It really is quite strange...and yet somehow compelling.
Cooking Guide, guides you through a recipe and can be controlled by voice command. It also has a built in timer and shopping list, the best feature of which is scaling ingredients so you can easily increase the amount of portions.
Not your usual DS game, (but then there have been some really different ideas for the DS that have worked, Brain Training etc.) and not all that fun, but I thought it was an interesting side-note.