Even in its day, three games in one cart was rare, let alone three great titles.
Mario and Duck Hunt need no introduction, they are classics and fun titles for the time that can be enjoyed even now.
Track Meet is perhaps the less known game that works with the Power Pad. Think of a DDR mat, but with four rows of two sensors..one side for each player, yep it was two player. You played standing on each of the colored circles and alternated your steps to run, leaping from one circle to the next for long jumps and so on. You really could get a workout from Track Meet, so long as you don't have the urge to sit down and smack the sensors with your hand.
Due to the effort exerted, you may find yourself playing this one the least of all the games. The Power Pad does a good enough job, but hurtles and jumping can be a little strange as far as timing goes. All in all Track Meet is still enjoyable.
Why buy these separate if you can get them together, three must have classics for all ages.