xxFly Boy w/white glueGUI 4401 Guillows Fly Boy Glider with Glue This is the FOURTH SKILL LEVEL in the "Build N Fly" construction kit series, a series which will teach you how to build and enjoy flying model airplanes. The Fly Boy requires you to use all the simple building methods experianced in the first three kits. This challenging airplane will reward you with the longest and highest flight performance ever! Wing Span: 21"