Addictive to the point of self-injury... But in a good way!
I learned the hard way that there is a reason why carnival games cost so much (besides the whole making money part). It's because if you play them too much, your arms start to hurt - badly! The first night I brought this little gem home, I played the milk-jug toss so many times that I could barely move my right arm. Oops!
The only negative thing is that you never really "beat" the game... just win a bunch of virtual prizes (which is kind of lame). Who cares about a stuffed bear, if it's stuck in your Wii. Now, if Nintendo sent me a prize every time I won "the big one", well hey, that would rock.
But they don't. And that's okay. I'm still going to keep playing Carnival Games because it's fun, especially at parties, even if you must practice moderation ;)
I'm not going to keep playing the electric ring game, though, it's just too frustrating!