Freya's Florence page on Facebook reminds me of the ice skating at the Parterre:
"From November 26, there is an ice skating rink at the Parterre, near Piazza della Libertà. The large rink holds up to 200 skaters and for those of you who forget your ice skates, you can rent them for 6 euros."
This is something my wife and children do every year... but I can't skate!!!