What is the best exercise for baby 6 months old?

My 6 months old baby is very active so I let her do whatever she wants. She crawls, stands, climbs and stumbles. Haha. I also put her on the walker for a short while if I need some time to put the laundry in the washer. Other than that I do the cycling in the air exercise with her everyday on her back but that is more to stimulate her bowel movements. You can also try these exercises to train his balance.