We had $50 for RFC on our last trip, plus you can get 10% off with AP or DC (and maybe more ways too) so we basically had a $55 dollar head start on our bill. The portions are large. 1 kids meal can easily feed 2 young children(as we found out on our last trip).
If you like chocolate, GET THE VOLCANO. We (Me, DW, DSs 1&3) all split this and it was great. Triple chocolate cake, Ice cream, chocolate brownie, Whipped cream, and chocolate topping.
have fun.