guckkasten
http://www.hijoju.com/ http://www.youtube.com/watch?v=o8IOC-ihboI http://wernernekes.de/00_cms/cms/front_content.php?idart=436 https://www.google.co.jp/search?q=guckkasten&hl=ja&rlz=1T4SNJA_ja___JP427&prmd=imvns&tbm=isch&tbo=u&source=univ&sa=X&ei=JmQ4UMuUEc-WiQeawoCQBA&ved=0CCkQsAQ&biw=1089&bih=572 http://en.wikipedia.org/wiki/Guckkasten http://www.myspace.com/guckkasten http://kpop2jp.blog93.fc2.com/blog-entry-681.html