Here are some different ways of doing the carving of the number one:
http://www.veenaartofcakes.com/number-cakes-one-two-twelve/
https://www.youtube.com/watch?v=BsMwKKuhTAw
http://thelavendercakes.blogspot.com/2012/03/how-to-make-number-1-cake.html
http://www.themepartiesnmore.com/cake_number_cakes.htm
