I like the repousse workshop a metal artist I know did a while ago starting with an Altoids tin.

http://www.metalsmith.org/pub/mtlsmith/V26.1/altoids.htm

A little CW transceiver would be fun. String a wire to a tree out camping and talk to someone in Germany on 40 meters...

Allan
_________________________
Et par le pouvoir d’un mot Je recommence ma vie, Je suis né pour te connaître, Pour te nommer
Liberté

And by the power of a single word I can begin my life again, I was born to know you, to name you
Freedom

Paul Eluard