Mousetrap:
There ya go! Brussel Sprouts are great home grown.

I also thought you might be talkin bout bean sprouts, which you eat as soon as they, well, sprout!

Keep your seedlings in a fairly cool but sunny location indoors. You don't want them to get leggy before plantin time.
If it is sunny enough during the days you can set em outside to harden off. They're too tender to leave out overnight, yet, even in a cold frame. But they should be gradually introduced to the outside world, so they are not shocked when you plant em. Just DON'T let em freeze!

Good Luck