I've been talking to my 3rd & 4th grade gifted/talented students about the vastness of space. After telling them of what I heard on NPR, they decided they wanted to participate in the Listener Challenge. All work is done on simple construction paper.
"While we are here on Earth searching for aliens, aliens are probably doing the same. So, when we say, 'I wonder what's out there,' aliens (if they don't already know we exist) will be also wondering." -Noah

Mike