Flying to Mars with the Mars 2020 Rover
If your name is approved, it will be etched onto a microchip. The microchip is placed aboard the Mars 2020 rover, which will land on Mars. Your name, a representation of you, will literally fly out and land on Mars in this landmark mission in 2020 (hopefully). It's a great, albeit tiny, opportunity to be a part of something so significant.
Link: https://mars.nasa.gov/participate/send-your-name/mars2020