A brief excursion up to Colle Sant'Agata (starting from FBK in Povo) to have a nice view on Trento and the Val d'Adige. The whole walk takes less than 1 hour.
A half-day excursion to Lake Caldonazzo to have a swim. Take the train "Valsugana" at the stop Mesiano and get down at the stop in Calceranica or Caldonazzo. Here are the schedule of the trains and a map of Lake Caldonazzo.
You can practice many sports in Trento (swimming, running, (MTB) cycling, tennis, etc.). Please, ask the organizers if you are interested in anything.
A visit to the S.A.S.S. (Spazio Archeologico Sotterraneo del Sas) brings you in the underground of Trento to see the ancient Roman ruing of Tridentum. See the official website (Italian only) for more details.
Other museums in Trento and Trentino are listed here. Among them, the most interesting museums in Trento are the following: Museo Diocesano Tridentino, Castello del Buonconsiglio, Museo delle Scienze, Museo dell'aeronautica Gianni Caproni.