So far I've just done research on the bath bombs, but they seem fairly easy, you just have to work quickly to avoid drying them out. I've heard the most expensive ingredients for these are the citric acid and the fragrance. But you could get 2-3 girls together to pitch in and have a bath bomb party. I would do that, but I don't have many girl friends so it wouldn't be much of a party. :-)
I found a couple links.
This one has a lot of organic ingredients for soap and other bath products, and they seem pretty reasonably priced.
This is the best and easiest recipe I have found for the bath bombs, I'll be using it when I make mine. I just have to find a mold.
I'm still on the prowl for lotion/body butter or bubble bath recipes. I'll post here when I find some.