http://neorigami.com/neo/index.php/en/t ... -with-ears
Two recommendations:
1. Use the single color paper for the hat and the two-colored paper for the ears.
2. Make an open sink fold at the top of the ears in the last step.
Please let me know if you do try to fold it. I would love to know! If you need help with any step, I'll gladly explain it to you

*Image provided by Tadashi Mori.