That's exactly what we're doing but it does seem a shame that there's not many child sized meals of normal food. You have to either purchase an adult sized portion or share yours & get an extra appetizer. It would be nice if your child could get an appropriately proportioned sized meal of their own of the same type of food on the rest of the menu. Especially since you can each choose what you want instead of having to make that decision on something you are sharing.
It would be nice from a parent's standpoint -- after all, that's the way we feed our kids at home. We don't eat steak and give them chicken nuggets; we give our kids a smaller steak, if that's what they want. However, if you look at kid's meals at restaurants, that's not the way it works. All kids menus are different offerings, much smaller plates and typically cheaper, plainer foods than the adult menus.
Kids' meals are a loss leader for restaurants. If you offer the kids' meals cheap, maybe just above cost, then the parents will be more willing to pay full price for their own meals, maybe even splurge on extras or a more expensive meal. Look at all the places that offer "kids eat free" on their slower nights.
Kids' meals are plainer foods because most kids balk a bit at blue cheese crusted steak, asparagus with hollandaise, strawberry-rhubarb crumble, or other dishes designed to tempt an adult palate. Some kids may be more gourmet, but most want familiar foods like burgers, fries, pizza, chicken nuggets, and ice cream.
Kids' meals are typically limited to "guests 10 and under" because the restaurants don't intend to feed adults at almost no profit. Some restaurants have started catering to smaller adult appetites with seniors' menus (but you have to meet an age requirement there, too!), or "lighter selections" -- but if you notice the prices aren't necessarily much lower than full-sized portions.
our meals at the TS. It would cost me more than the 
