We spent some lazy days at the beach in Alcudia, Mallorca last week and one really nice activity was the Parasailing.
A really nice view and you can just sit and watch the surroundings. It's not super high but I guess that if you are afraid of heights this not recommended.
The cost was €40 per person and lasted around 10 minutes. The boat picked us up together with a few other people and we sat in the boat during the time other couples where doing the parasailing.
In each set 2, 3 or 4 people where sent up sailing. Children where not allowed to go up themselves due to weight reasons, so a couple of young siblings had to go up together with an adult couple (which they did not know). A single teenager where sent up with another couple. The total time on the boat was around 1 hour.
Recommended if you can afford it, like heights and want to something other than the usual beach activities.