I applaud the community outreach effort s by the Mauna Kea Astronomy Outreach Committee with their numismatic coin contests in 2011, 2012 and 2013.

Here are the winning designs

http://mkaoc.org/coin/

The aluminum version were provided to the children (a dealer has listed one on eBay).

You can purchase the bronze 2011 and 2012 versions at the

http://www.maunakeastore.com/souvenirs/coins.html