I used to eat at Planet Hollywood a lot prior to 2000 but since then I think their quality of food has gone downhill. I have really wanted to go back since especially since IMO, there are much better restaurants around Disney Springs than Planet Hollywood. You were asking for a kid's menu and I found one from March 2018...
https://touringplans.com/walt-disney-world/dining/planet-hollywood/menus/kids-lunch-dinner
You also mentioned D-Luxe Burgers. Again IMO, I would go to D-Luxe Burgers anytime over Planet Hollywood. My wife and I went to D-Luxe Burgers shortly after they opened. We split a regular order of fries after we saw how large the regular order actually are. We ordered two different burgers and ate half of each other. The burgers are really good and huge. When we get a burger craving and we are in Orlando, that is were we go. Also, we now split a burger and a regular order of fries and that is enough to fill us up. With outdoor seating, you have your choice of eating inside or out.
Enjoy your trip next month but I would pick D-Luxe Burger over Planet Hollywood.