Visiting the Tulum Ruins with the family is a definite must do while visiting this gorgeous town. You can take a taxi, bike, or drive down to the ruins but the parking lot can get a bit crowded later in the day. Our favorite time to go is right when the Ruins open at 8am. This gives a good amount of time before tour busses arrive and usually you can get the place mostly to yourself!
You can typically walk through the Ruins in about an hour but give yourself time to explore the beach that you can only access through the Ruins themselves. Make sure to bring lots of water for the kiddos! It can get hot!