Do you have an eye dropper? Look in the medicine cabinet. Steal one off any bottle. If not, do you have a plastic straw? You will need to heat the end with a lighter to take the sharpness off the tip, but liquid still has to be able to get through.
Mix one teaspoon brown sugar into a quarter cup of warm water. Suck the brown sugar water up into the straw and when it's half full put your finger over the top of the straw to hold the liquid in.
You may need help to hold the chick while your pry the beak open. You will be slipping the blunted end of the straw into the right side of the chick's beak. (It's right side) Slide the straw about half an inch along the right side of the chick's throat into the esophagus. If it chokes, you don't have the straw along the right side of the throat. So pull it back out and try again until you get it in. Then let your finger off the top of the straw so the liquid drains out of the straw into the chick's crop. Can you do that? Here's a picture of where the straw should be going into a chick's throat.