You can build various models of aircrafts or flying machine
(any era). Try using paper, balsa wood, or a kit; it can be elaborate
or simple. Why does it fly? Is that the same principle on which the
real machine flies?
If you want to make wood glider designs check this out.
If you want to make a JET Paper Glider Model check this
is another fascinating Internet source to make gliders!
Try it out!