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