What do you keep in your car for your toddler/kiddos?

I have an almost 5 year old and a 2 year old. I have a bucket of car toys, some books, always have extra outfits for my 2yo, think I need to have an outfit for my 5yo, a picnic blanket, a blanket for each of them, and so far that is all that’s stayed in there. Maybe an extra jacket for each of them as it gets cooler? Idk! Curious what other mamas have their cars packed with. We are on the go a LOT as I am a nanny and I also have to make a 1.5 hr round trip drive 1-2x a week for my younger sons visits.