The RIKEN Center for Developmental Biology has created a set of game cards illustrating basic concepts, such as embryonic stages of development, cell types, various model organisms used in research, and mutations in the fruit fly Drosophila. Printed versions of these cards have been distributed to visitors to the CDB Open House as well as at a number of international academic meetings. The data for the cards are now available free of charge for non-commercial use. http://www.cdb.riken.jp/en/index.html -- Go to 'Learning Center', then 'Multimedia' to download the game.