Congratulations!
Give them as much space as you possibly can and try to feed them at least 2-3 times a day (up to 5.) Keep up with tank cleaning and water changes, especially if you're feeding heavily. After a few days they'll readily accept powdered flake food (I just grind up regular flakes), and when they're large enough they'll
love frozen brine shrimp. If you can hatch live baby brine shrimp for them, then that's even better. Within 2 weeks or so they'll be large enough to put with the adults (though keeping them separate will mean less competition for food.) Within 3-4 months they should be to a size that most pet stores would take them.
(And keep an eye out for more fry--they can hide quite well, and I've found sneakers up to 4 days after they were born, peeking behind tank equipment and plant leaves.)
One of my juvie dalmations just had her first fry on Friday! I've found 14 so far and it looks like some of them may be calico like their daddy. :3 *fingers crossed for lyre-tail calicos!*
And, I'm curious, how long are your new fry? I'm wondering if there's a difference in fry size between different breeds, but there's not a whole lot of particular info to be found.