Get a large cardboard box and a lamp of some kind (around a 60w bulb).
Place some paper towels in the bottom of the box and hang the light bulb above the surface...try it at about 16" high to start with and see how the chicks react...
If the chicks huddle under the bulb then lower the bulb a couple of inches (they're too cold). If they appear to try to get as far from the bulb as they can then raise the bulb (they're too hot). If the chicks are walking all over the place, under and out from under the lamp, then it's probably about at the right height.
Put some feed in a shallow dish (shoe box lid) and tap on the box lid to attract the chicks to it. You really need a waterer made for chicks. If you have one then touch each of their beaks to the water so they know where it's at. You could make a chick waterer out of a plastic jar if you need to...put a small (1/8"?) hole in the side of the jar towards the bottom about a 1/2" from the bottom. Fill with water, screw lid back on and sit the jar down into a shallow dish that is deeper than 1/2". The water should flow out until it reaches the height of the hole and then stop. Be sure the lid has a tight, airtight seal. Put some marbles/clean rocks in the water dish to keep the chicks from climbing in and drowning...they'll sip water from between the rocks/marbles.
If you have a room/outdoor thermometer you might set it in the box with the chicks to monitor the temperature. 95F would be a good target temp for the first week.
You will need to study up on brooders and raising baby chicks, but this should get your chicks stabilized for the time being.
Best wishes!
Ed