Replying to HEY NS!! If you have played a WII HELP ME!!!

OK so my dad wants me to go down to walmart in a bit and pick him up a Wii for him and my mom to play. They are like 50 years old and dont really like video games, but he likes the idea of the wii and its controling, sooo...

my problem is: i dunno what games to get him, they need something simple yet entertaining, something they can play together and have fun. I really dont wanna get them a game and have them say how confusing and hard it is to play. I also think that games which require lots of body movement will be more fun for them.

I was thinking:

Mario Kart
Super Mario
and a sports game.

input is much appreciated, thanks!