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For more details about sand animation check the links below:
• Sand Animation and stopmotion on glass by Cesar Diaz
http://www.youtube.com/watch?v=lhqr-P2O0XI&NR=1&feature=fvwp
• The owl who married a goose by Caroline Leaf
http://www.youtube.com/watch?v=fusYZ7eIhps
• Live Sand Performance by KseniyaSimonova
http://www.youtube.com/watch?v=518XP8prwZo
