A couple things that could be considered in Los Angeles area....in Fullerton
you can try out Air Combat USA..( I quess they run out of North Las Vegas
also...???) I've never done it but sure looks fun..here's a link to them
http://www.aircombatusa.com/nfs.php

At Planes of Fame in Chino I think you can still buy a flight in a P-51 and
Stearman...I could be wrong but I know they were available at one time
http://www.planesoffame.org/

March AFB has a GREAT museum on the west side of the base

Blackbird Airpark in Palmdale

In Las egas you can try the Indoor skydiving thing...it is AWESOME!!
http://www.flyawayindoorskydiving.com/

Both cities have a TON of things you can do.

HAVE FUN!!!