This is actually something I feel really passionately about. Sort of an nontraditional gift, not exactly anything you put under the tree.

Be the Match - Join the National Bone Marrow Registry.  It is really easy to join - you sign up online and they mail you a cheek swabbed thing, you do that and then mail it back.  Then you are in the registry.  People 18-30 are ideal because bone marrow ages, too.  They only call you if you match someone and you can always say no.  

Yes, typically family members are matches.  No, I don’t know anyone who has personally needed bone marrow.  There are literally thousands of people out there needing bone marrow and are just waiting and hoping for a match.  And someone surely is!  It is just a numbers game, and more people need to join the registry.  So I say join.  A great gift.