I got a few comments a while back about how to conduct infant pottying out of doors!
People seemed to think I meant it was OK to leave baby poo just lying around in spaces others are using. I didn't really mean that! I was talking mainly about wees. Babies surely should be able to pee on bushes, just like dogs (and little boys) do. I also don't really see that much of a problem with baby poo out in the bush if you cover it up afterwards with lots of earth.
When you're out and about in more frequented areas, and your baby signals that she wants to poo, however, you do need to have something up your sleeve, so to speak. Sometimes baby will give you enough notice to get to a public toilet. However, last week I went to pick up Torsten from preschool, and was sitting on the front step waiting for the doors to open when suddenly Umi announced (with a few ladylike grunts) that she wanted to poo. There was no toilet available. I was nonplussed for a moment, then remembered I had a plastic bag in my backpack. I fished it out, opened it up, and let Umi poo in it. Then I tied it up and took it home. I have no idea what the other parents thought of the process - I was too shy to meet anyone's eye! :)
A better idea would be to carry a couple of sheets of newspaper for this purpose. Not only would it be easier to aim a pooing bottom on to a spread-out sheet of paper, it would also be easier to dispose of later, and more environmentally responsible.
By the way, when I said I was nonplussed, I meant in the English sense of being perturbed, and not in the American sense of being not perturbed! That usage really nonplusses me!!