The theme for the 15th International Robot Olympiad in Dec 2013 is: Robots in Agriculture: "How robots help provide sustainability for farms of the future".
The use of existing mascots -- however, yours to modify or change completely if you’re so inclined! -- in an agricultural/ranch style scene. Two existing mascots and the IROC logo (orange and blue) are available for your use, and usually included in all Olympiads each year: "Ro-pi" and "Ro-ah" (http://www.ameribotics.org/iroc_logo_mascots.jpg).
Also included is a copy of a previous Olympiad poster for continuity (http://www.ameribotics.org/IRO2010.jpg). The 2010 theme was: "Robots helping secure our water future".
We are open to your creative expression and scenes, including mascots, and not limited to, ranch scenes/corrals/fences/ranch and farm animals/tractors/farm implements, etc. Again, the Olympiad is in Colorado, USA, which is the first American hosting of the Olympiad in its 15 years.