[header] How to make a simple homemade incubator for chicks [title] Cut out a hole at one end of a styrofoam cooler. [step] The hole will contain the light bulb and its socket. Insert the socket from any lamp and put in a 25 watt bulb. 
Place duct tape around the hole and the socket from inside and outside the cooler. This is very important in order to reduce the risk of fire.