Using a baby as a Wii Wheel substitution is not the best idea for either your gameplay or the infant in question. Our sister site Nintendo Wii Fanboy has this and more suggestions for when the Wii Wheel isn't enough
. In case you're looking for more Mario Kart Wii
-related shenanigans, they've also devised a listing of potential "alternate karts," including what we envision would be the most "kart" race ever: Wario in a rickshaw vs. Yoshi on a pogo stick.