What meals do you bring on the go to prevent eating out?

My family has a bad habit of eating out when we are out running errands. Recently, I've been packing lunches to bring with us but it's been pretty repetitive. I've only done sandwiches and crackers,cheese and pepperoni. I will usually also throw in some fruit. The kids are getting kinda tired of this so I'm hoping to find some good ideas of things we can bring on the go and that are kinda kid friendly/not too messy. Thank you in advance!