Thought I read somewhere that you can make your own pizza's at PCH Grill. Is that part of the character lunch/dinner? Sounds like something the kids would enjoy.
I'm not sure about PCH grill, but my DD made her own pizza at Storyteller's in the GCH. She had a lot of fun! They bring the pizza crust, sauce and cheese to the table, the kids assemble it and then they take it to the kitchen to bake.
They bring it to the table hot and fresh. Definately a hit!
DS did that at PCH Grill for our dinner in September. Not only was it fun (we're veggie so he got an extra cup of cheese for the pizza) it was good pizza, too!
And he still plays with the paper chef's hat that's part of it.
Disneyland in general seems pretty easy with the kid vs adult meal, so there's no harm in asking if an adult can order it!