Homemade Electromagnet

quick, just 30 sec. project(if i can call it "project")
things you will need :
 -1.5 volt AA battery
 - copper wire
 -nail or screw

first  take a wire and wrap it arround the screw
 take one end of wire and tape it to + end of battery , and  2nd end of fire and tape it to - end of battery
and there you have it, your homemade,simple,easy,..... electromagnet