Yea I could understand how sometimes it's difficult after having a kid your body tends to change, but yea standing is a good thing and walking a lot also is a good thing.
Well I really don't know what kind of creams are good because there are so many products out there. So what I suggest you should do is search for them on line, where you could get different product name find it's effect and then go from there. You could even look for stores you can buy the product from. That's what I would do.
Also I suggest you try to make time to work out I know it's not easy when having a kid but i'm sure you can make time. Eventually with time you could see good results.
Good luck if anything i'll help you find products if you want....