I don't have time for the gym and I really hate it. Also most all of my exercising is walking/jogging with a stoller. So I'm basically only doing cardio. I do some pretty intense hiking which takes care of most of my legs 2xs a week, but I'm doing nothing for my abs or upper body.
The only time I would be able to add would be 30 mins of balance ball videos. I have 3 30 mins DVDs (upper, lower and abs). I was thinking I could add this in 3xs a week either before work or durning my son's nap. What do you think is it some what equivalent to lifing? There are lots of sit up type movements, planks, holding body parts in positions and using your body weight for resistance, push ups, etc. I guess it's better than nothing right?

If you do it properly, you can get a killer workout! I was fortunate to take a ball class once and got a lot of great ideas from it. I'm trying to replicate it, but without the teacher saying, "Ok, great now another 20" I tend to stop before I probably should.
But if you have videos, that should really help with that.