Art of Entertaining Series - cooking demonstrations, napkin folding and Ice Carving
Brunch in Palo (ok, it's Number ONE!!)
Shows in the theater (WDT)
Cabarette shows (family and adult) and the "Game Shows" - ok that's 4, but there's still more!
Navigator Series
Art of Entertainment Series (meet the performers, go up on the stage, etc)
My Bad, you only wanted 3, I came up with six.
Not into wine (really don't like it much) but for those who do, the "Steem to Stern Wine Tasting" class is very enjoyable
Ping Pong while the ship is moving (it's a challenge)
On the sea days if the ship is heading into a strong wind, go up to deck 10 forward and go in front of the wind screen. "Hold on to your hats and glasses (and small children), 'cause this here's the windiest ride in the ocean" (thanks to Big Thunder Mountain)
Up to 9 - OK, I'll stop now.