Diving is Cozumel
Cozumel is one of the best dive destinations in the Caribbean. If you aren't certified, you can do a discover scuba activitiy with one of several dive operators as well as most cruise lines (thought it will cost more with the ships excursion) One often recommended dive op is <a href=http://eagleraydivers.com/WhatsNew.htm> Eagleraydivers.com </a> The costs is $69 for 1 t dive, $113 for 2 dives. Scuba is so much more liberating that snorkeling. You have complete freedom of movement. You are weightless in another world.
As for scooters, they are a very BAD idea. There is no better way to risk ending your vacation in the hospital than to ride on a scooter in Cozumel.
Here is a quote from a resident of Coz regarding renting scooters:
Please, please do NOT rent a moped:
EVERY day people are "scraped up" of the roads of Cozumel as a result of a moped accident. Some only suffer some road rash, which is bad enough to ruin a vacation. Others go home in a box.
Here are the top ten reasons to spend a little extra, surround yourself with metal, and rent a car:
10. Taxi drivers trying to get as many people to as many destinations per hour as possible.
9. Mopeds do not have the power to accelerate out of a potentially dangerous situation.
8. Roads have occasional patches of gravel for no reason.
7. There are other tourists on scooters who don't know how to drive them.
6. Scooters have a short wheel base which makes them difficult to maneuver.
5. There are other tourists in rental cars who have just been to Carlos 'n' Charlie's.
4. Beautiful vistas take your breath away, as well as your attention off the road.
3. Most roads are one way, except when they're not.
2. Moped brakes are not always reliable.
1. Most north-south roads have the right-of-way, ...with some exceptions.
Get the picture?
Every friend I have on the island who owns a moped has had a very serious accident. Don't let this be you! Please rent a car.
Sally it the owner of the Mini-golf on Coz and this quote was taken from the cruisecritic.com message board
Of course, as adults, please feel free to do as you see best.