Personally I'd recomend he tries recorder 1st. As well as being one of the best instruments ever invented (ok I'm biased!) ...
This comment in a different thread got me thinking.
Recorder: small, light, robust, portable, inexpensive
Piano: huge, heavy, delicate, stays in one place, good one costs a fortune ...
I know we have polyphony and a huge tonal range - but unlike many other instruments we can't bend those notes (flute, trumpet, Sax, guitar) still less play all the notes in-between (violin, trombone, voice)/
But a piano ain't much use for laid-back gentle post-party stuff at 2 or 3 in the morning, and I've never heard one around a campfire. Nor is it much of a choice for busking - though I have seen enterprising types that drop off a piano in street corners from a flat back van.

