| 2018 |
Energy |
 |
| 2017 |
Sustainability |
 |
| 2016 |
Science in sport |
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| 2015 |
Light |
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| 2014 |
Crystals |
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| 2013 |
Water for thought |
 30 |
| 2012 |
Astronomy & Time: The Mayan Legacy |
 |
| 2011 |
Chemistry |
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| 2010 |
Biodiversity |
 |
| 2009 |
Optics |
Laima Servaité, Lietuvos Gamtos Mokslų Olimpiadų Asociacija, Lithuania |
 |
| 2008 |
Solar Energy |
Anna-Maria Antonova Petrova, Sports school “G. Benkovski”, Varna, Bulgaria |
 |
| 2007 |
The Tops |
Christian Vandercammen, Jeunesses Scientifiques de Belgique, Belgium |
 |
| 2006 |
Water Fountains |
Tatiana Belenova, Science Club for Kids, Russia |
 |
| 2005 |
Water Rockets |
IES Guindavols, lleida, Spain |
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