I have been recently researching for an article though the article is not ready I can share three things with you:
Horse back riding in Lucca - not as expensive as I had thought and a fun afternoon. You can check out this link for more info. I used the link below and enjoyed the trip, the horses and the service. http://www.luccahorseriding.com/
The last activity I checked out was a trip into the Abetone mountains right outside of Florence, besides being a beautiful place, I found a world record just waiting to be tested (actually it has been demoted to 2nd place in the Guinness Book...but it was still cool) a Pedestrian suspension bridge. ohhh, and for the parents: free attraction. I did this and the Botanical Garden on the same day. This attached link gives you an idea for an itinerary http://www.pistoiaturismo.it/pdf/en/scheda01-VESPA-E-b.pdf
Actually I am going to take on another place, my favorite museum in Florence is Palazza Davazanti, it is a building restored to the time frame with authentic furnishing for the bedrooms and kitchens. http://visitflorence.com/florence-museums/palazzo-davanzati.html