These are much more than simple balloon animals. Jason Hackenwerth‘s creations float like giant swimming organisms. His newest creature, Pisces, which recently debuted at the Edinburgh International Science festival is particularly massive. Pisces is built of thousands of balloons blown up and tied together. It took three of members of the festival six days to blow up all of the balloons for the 40 foot structure. The piece now hangs in the Grand Gallery of the National Museum of Scotland through April 14, 2013.