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Jonathan Huygens asked the Naked Scientists: Hi,My name is Jonathan Huygens, and I'm trying to create an artwork that involves rain.I have however come into contact with some difficulties.My intention is to make it rain inside a room in a manner that is child friendly....and i've tried heathing up water until it evaporates and then coolingthat down. Ithink this should do the trick however i need some better cooling equipment. Do you have any suggestions? It should be not too expensive, not big and non-toxic, but still be able to cool down a room of about 4m x 8m x 2m enough to create the rain. The results of my experiments up till now have been: the evaporated water that starts to condensate onto the walls and ceilling and then starts to drip off, wich is not the result i'm looking for.I have also been wondering is there a material that repels water? much like a ballooncan atract water (as show in kitchen science: bending water-static attraction).That would mean that i could cover the walls of the room with this material and thusmaking the evaporated water to concentrate itself into a certain area and making itmore easy tot make it rain.If you could help me with this i would be really grateful.What do you think?