Another interesting one from Ralph KB8ZOY on how to build simple radios.
This page shows you how to build a really bare-bones radio. You might even have the stuff around your shack already. If not, you might want to buy the stuff to have available should somone you know show some interest. That way you can wow them easily.
JIM CUMMINGS says
I would like to build a CW rig. power range is 1-20 watts and if I can get it up and working I would like to build a matching receiver.