NASA have a pretty exciting program at the moment, in March 2016 they will be sending another robot to Mars as part of the Insight Mission.
As part of this mission the cargo will include a microchip which is a 0.8cm square (pictured below)
http://mars.nasa.gov/layout/embed/image/420/?i=6752
This microchip will contain the names of over 1 million people!
You can register your name here, once you have registered you are issued with your boarding pass and NASA frequent flyer details. Its pretty cool and definitely something that the kids will like.
I’ve got my pass, do you?
http://mars.nasa.gov/participate/send-your-name/insight/?action=getcert&e=1&pid=3&cn=40524596809