A girl looks at fossils during the Science Picnic in Zagreb, Croatia, Sept. 15, 2013. More than ten thousand people visited the event organized for the purpose of popularization of scientific knowledge. (Xinhua/Miso Lisanin)
A boy performs popular Tesla electricity experiment during the Science Picnic in Zagreb, Croatia, Sept. 15, 2013. More than ten thousand people visited the event organized for the purpose of popularization of scientific knowledge. (Xinhua/Miso Lisanin)
Children enjoy in experimenting with liquid during the Science Picnic in Zagreb, Croatia, Sept. 15, 2013. More than ten thousand people visited the event organized for the purpose of popularization of scientific knowledge. (Xinhua/Miso Lisanin)
A boy looks through a microscope during the Science Picnic in Zagreb, Croatia, Sept. 15, 2013. More than ten thousand people visited the event organized for the purpose of popularization of scientific knowledge. (Xinhua/Miso Lisanin)
A girl makes a soap baloon during the Science Picnic in Zagreb, Croatia, Sept. 15, 2013. More than ten thousand people visited the event organized for the purpose of popularization of scientific knowledge. (Xinhua/Miso Lisanin)
Children look at a controlled explosion during the Science Picnic in Zagreb, Croatia, Sept. 15, 2013. More than ten thousand people visited the event organized for the purpose of popularization of scientific knowledge. (Xinhua/Miso Lisanin)
