P.
My 6 year old prefers the disc that came with it - in spite of all the ones we have bought or rented from Blockbuster! I strongly recommend renting first. There are a lot of duds out there. Blockbuster has a nice selection.
My 6 year old loves the golf, bowling and tennis best (go figure). You do learn a lot about math, listening to rules and handling competition from them. When she recently went to a real bowling alley, she bowled a strike on her first ball!