Isla Mujeres is a short ferry away from Cancun. Plenty to do, including great snorkeling and beaches. There are a large variety of tours for both families and adults.
If you’re looking for a high energy day party, this is the move to make. Aedra and I did this when we were in Mexico in 2024 and had a blast! Open bar, the boat leaves from the pier, docks maybe a mile out and you party for a few hours. Let us know who wants to do this and we can all book as a group!