I have printed out a couple of lessons to fill the time until the plants start sprouting. The first is from EasyFunSchool about how "seeds are baby plants". We used pinto beans from the pantry.
I bought tomatoes, corn and cilantro seeds to start. I have a small raised bed which we have been composing in all winter. It is made from the boards of an old water bed frame. So we have limited space to grow. But I hope to grow as much as we can this summer. In our yard we already have an herb garden( thyme, sage, mint,and chives), raspberries, Egyptian onions, and a small strawberry bed. I plan to tuck more food plants in the flower beds around the yard. It is important for the kids to learn to grow some of their own food. I have read a couple of really good books on permaculture by Bill Mollison. Everyone could do this on any size lot.