We are going to Mazatlan for a week with a 20 month and 3 year old and my parents.
I want to bring car seats for the plane ride and the taxi ride to the condo. Once we are there we will be using public transport (buses) most of the time.
My dad wants me to leave them home, says they will be in the way, "we never used seatbelts when you were a kid," etc...
I don't know what to do.
He also pointed out that even if you bring carseats, most of the taxis don't have seatbelts.

