Note, if there isn't a kids meal, a kids QS plan can be used for an adult meal. You can't judge by the online menu whether or not a place has a kids meal because they often have them but don't show them online. The seafood place in Simpsons area and Volcano Bay are two that didn't have kids meals.
Note, you might be able to upgrade them to an adult plan before you get the cards.
Remember that the beverage and snack credits are grouped together. So *don't* get beverages with the credits. Get butterbeer or ice cream or the Big Pink with the snack credits.
Also, remember that you can buy a QS plan at the same cash register where you will be using it. So if you are thinking you might want to pre-buy more - don't.
A QS Plan is particularly good for a growing boy. With the entree credit you can buy the combo meals that include a bonus item like a shake.