Here are short videos to inspire you to workout with your stability ball. Each video demonstrate easier to harder options and from low to high impact cardio exercises.
Do each exercise for 30 to 45 seconds with 10 seconds rest. Go to the next exercise (same short video). At the end of the set, take between 30 to 60 seconds rest and begin the second short video. If you want a longer workout, repeat the same video twice and switch legs in necessary.
Legs: squat twist and squat jump: https://youtu.be/Wz-If_FunyU
Legs: lunge twist and jump up: https://youtu.be/yeUW6fwgA9U
Upper body: row and triceps: https://youtu.be/Ga2J1ZGO1cY
Core and hamstrings: https://youtu.be/lGfCz7E6J8s