We like to introduce people to various beginner's routines. This one is simple and pretty good. Done daily for 2 or 3 weeks (it should be easy by then), a person can move on to more challenging fitness programs.
20 body weight squats.
10 push ups.
20 walking lunges.
10 dumbbell rows (using a gallon milk jug)
15 second plank.
30 jumping Jacks.
Repeat for 3 rounds.