Apps for toddlers?

JV

We’re about to go on a looooong car trip for our vacation. Our total car time will be about 4.5 hours each way. HOPEFULLY my 21-month old will nap for a good chunk of that time but I know she won’t for the whole time. We are planning several stops on the way so she can play. But just in case she starts going bonkers I want to be prepared! We have an iPad Mini and I’m planning on downloading a couple episodes of Sesame Street. But does anyone have any recommendations for simple apps? We have the Starfall ABC app and she likes it. Thanks! Also any general recommendations about car trips would be great!