Ok mommas this saturday will be my first time flying in airplain with my toddler what advice can u…

Ok mommas this saturday will be my first time flying in airplain with my toddler what advice can u give me that might happen in my 3-hour flight my 7 year old will be with me as well I'm just nervous on how my toddler would be able to sit down during those three hours we leave at 9 in the morning so between those times I know he will go to sleep we get to Texas around 12