How do you make brushing teeth a fun time for toddlers?

I went tooth brush shopping with my daughter when she was younger so she could pick out her own toothbrush. Most hypermarkets have a wide range of kids toothbrush with cartoon characters so she had a good time choosing one. Since she has a sense of ownsership of the toothbrush, I'd say "Wah, now you can have teeth like Cinderalla" or whatever cartoon she picks and the trick works! But I also change her toothbrush regularly.... especially if there's a new cartoon movie lol.