We used the Kids Eat Free Card while we were down in July.
Our Kids are 11 and 9.
We picked up the card at one of the ticket stores when we arrived. The website says you need one card per kid but the person at the store said we needed 1 per family (still needed to buy 2 adult meals to get 2 kids meals free).
Most of the locations have the kids meals at 10 and under. The card information says 11 and we were never asked the kids ages.
We mainly used the card at Ponderosa, Cici's, and McDonalds without an issue.
We had one problem with The NASCAR Cafe at Universal City Walk. One night we had no problem. The next day we went for lunch and they insisted we needed 2 cards and would not budge.
The list of locations mentioned in the website is out of date. A&W and the NBA place at Universal City Walk no longer accept the card and there were a few others as well.
When you get the card they include an insert with the places that accept the card.
The majority of places on the list were Ponderosa, CiCi's, McDonalds, Sizzler, Basken Robbins. There were 20+ smaller independant locations as well.
Rob