https://www.youtube.com/watch?v=35Nvl95Ca_E
https://www.youtube.com/watch?v=gHChHDHnj-4
https://www.youtube.com/watch?feature=fvwp&v=0XFvG1xg6Wc&NR=1
8 all over, 7 sides
https://www.youtube.com/watch?v=9qIplOgpG8g&NR=1&feature=endscreen
https://www.youtube.com/watch?v=L_4X3kekYow scissor
https://www.youtube.com/watch?v=LdelTh65kco