My daughter is turning 3 in March and absolutely LOVES going to McDonald's playland...I know they host bday parties but I have never been to one. Can you give me your experiences if you have? Not sure if it matters, but I would either be looking at the Keller or Southlake one.
I took my kiddos to one off 635 and Monfort, the place looks like a Happy Meal. The kids just played and they had one host who took the order, brought out food, icecream and cake. Very simple and all the kids wanted to do was play and they had a good time. And the discount on the Happy meals wasn't bad at all my friend said.. She did it on a Saturday at 11am so it was less crowded.
Hope this helps and good luck!