I'm finding this difficult to answer, as you haven't said if the seedlings are in the soil or if you've grown them in trays inside. If the former, then thin them out.

If the latter, prick them out into individual pots and grow them on a bit, harden them off and plant them out. Keep watering them, of course in either case.

Too difficult to describe them - the leaves are rounded to start with, then later ones get more serrated, just like a mature Scabious plant...

I hope I've helped...