I would probably set up a scholarship program for the grand children, and their decendants.
Would force them to work for something, rather than just giving it away. Probably get a nice building named for me at the college of my choice too! I wouldn"t give away - I"d make it work for me, and boost the economy that way. No desire to join the jet set - probably would keep farming until it"s all gone!
PS, I have been hit by lightning!