All right, I started to get jealous of the games that are being played in so many other threads.... And it took me awhile to think of one, but here goes. Every answer must be a word or a phrase, and the next person to answer must take the last letter of that word or phrase and use it to start their word or phrase. So if the theme were vegetables, and I said "Asparagus", you could say "Spinach".
The theme of the game is "Things to do instead of watching TV".
I'll start:
Play a Board Game!