A few weeks ago, one of the kiddos brought home a pot filled with soil and said it contained three sunflower seeds. We've been watering and tending, and now there are three seedlings in the little 4" pot. The largest is 6" tall and has 3 pairs of leaves on it. Now what do I do with it? Will they die if I attempt to repot? How big of a pot should I plant them in? I'd love it if any of these little seedlings actually produces a sunflower!