I bought it from amazon for $18. The day I got it, I played it with my wife for about 45 minutes and haven't touched it again. It's probably worth $20
I don't know anything about little kids so I'm not sure if they'd like it or not.
Here's my initial thoughts after playing it once;
The graphics are pretty bad.
Darts was fun
Table hockey was ok
shuffle board was ok
Don't remember how hoop shoot was
Ping Cup was annoying, my wife could not get it to work properly. The response with the wiimote was bad and the game went on forever until I got all the cups.
Trivia was ok.
The reason I haven't played it again is because I have COD4, Mass Effect, GHIII, & Puzzle Quest for the 360 which take up all my free time.