These have been well known to science types for years - but they keep adding new members to the family. I like the new "Petri dish" mini-sets.
http://www.giantmicrobes.com/us/orderform.php
Something for idle minds to dwell on while we wait for the other shoe to drop...
http://www.giantmicrobes.com/us/orderform.php
Something for idle minds to dwell on while we wait for the other shoe to drop...