Roadtrip question with 13 month old

A • Mama🌈🎀💙

Question on roadtrip with 13 month old. Any advice on ways to keep her happy/entertained? It used to not be a problem but lately anytime she is in her car seat more than 15 minutes she starts screaming. We are taking a 4hr roadtrip next month. Trying to prep anything that may help. Thank you!