Had the kid's meals at Rancho and Plaza this weekend. No one batted an eye! If you want to get soda instead of the juices at Rancho, when you pay ask for a small cup (along with the special straw if you want it or have someone at home who might) and then you go back in to fill it. The lady at the Plaza didn't understand, and then the cashier was a bit clueless as well, so I just got a water (didn't need soda anyway).
I also got a salad (3.79) at Plaza, and the combo of the penne pasta, half-breadstick, carrots, apples, water, and the salad was VERY filling, and came in under what the adult meal would have been (and I wouldn't have had salad or bevvie included). Fabulous.