My Grandma Shoda had this pattern, called Crazy Daisy or sometimes also known as Spring Blossom Green (there seems to be a bit of a controversy amongst Corelle collectors as to its appropriate pattern name). They came out in 1973, just three years after the Corelle company started. I've seen nearly complete sets of these dishes from between $50-$100 in antique stores and on collectors sites. I've also seen them, luckily, in my local thrift shops and at garage sales.
So I began the hunt, and have tracked down quite a few pieces for next to nothing. While I'm not quite near a full set, I have found many of these cup and saucer sets, which are perfect for the girls' tiny portions and we use the cups as bowls. I have to say that Corelle is NOT indestructible, as we have found out over the past few months, but at less than 25cents a piece, I can take it. Also, the color green on the dishes is my favorite and the daisy pattern just makes me happy. I also think the company is great, and if you're not as into vintage items like I am, check out their website, because they've got funky new patterns galore (like this one) to love and I'm sure someday your grandchildren will be collecting them from the the Savers and Goodwills of the future.