Re: cooking tofu
It tastes good in smoothies. It's also really good grilled (although it's to cold for that now). You could use it in puddings. Or use it in place of cottage or ricotta cheese in recipes. Personally I don't like it plain but it does take on the flavor of whatever you cook it with.
Also the books 366 ways to cook tofu and other meat alternatives and Horizons cookbook have a lot of great tofu recipes. Although I don't know how many would be appropriate for a baby. There are a lot of other tofu cookbooks available too, check your library.