LOLOLOLOLOLOLOLOLOLOLOL
Do you need a license to create a table out of scrap wood or to make foam advertisements? Then why the hell would you need one to make a plane out of foam or balsa?
Unless you plan on making a huge one so you can fit inside and fly it.
in which case please make your
will before attempting to fly it.
I think you should ask if you need a license to operate the radios used in aeromodelling. If its 2.4G for control then no. Others probably you might.