Toys after kids age out of Little People?

My kids are starting to outgrow our Little People toy sets, and I'm wondering what toys other families are buying for this stage? Barbies? American Girl/Our Generation? Something else? They still like to pretend play with dolls or figures, I just don't know what will be the biggest bang for our buck and be played with the longest. I don't want to buy toys from a specific show or movie because my kids always lose interest the moment they have the toys, lol.