On another forum, there was a topic on necklaces with real cacti in them, you flood the tube with water and thats how you water it. I thought this was only in America, untill i searched Ebay, this is just stupid. Poor Mamm.
http://cgi.ebay.com.au/CACTUS-MINI-PLANT-PENDANT-FOR-KEYRING-OR-NECKLACE_W0QQitemZ190250709613QQihZ009QQcategoryZ155103QQssPageNameZWDVWQQrdZ1QQcmdZViewItem