New chicks can be very nervous of you unless you handle them a lot. This will help tame them up. If you just brought them home, you might not want to stress them out too much yet. But at some point, you need to start handling them, getting them out of the brooder, carrying them around the house so they know you are not going to harm or eat them.
Make sure your temp is right for their ages....starting at one week, chicks are started at 90 to 95 degrees. Temp is lowered by 5 degrees each week for 6 weeks. But the thermometer on the floor directly beneath the heat lamp.
Good luck with your new babies!