Pan Korek and young engineers used water and pressurized air to launch PET bottle rockets.
Video editing: Michał Szydłowski
Music: Kevin MacLeod "Fluffing a Duck", "Five Armies" and "Prelude and Action" from incompetech.com/music/royalty-free/
Recorded in July 2013 during summer activities of Children's University UNIKIDS WROCŁAW unikids.pl/wroclaw
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