I actually made a cake just like this last year for graduation only it was yellow and blue for the local high school colors. This year I had a local girl who was graduating from her homeschool that wanted it in rainbow colors.
This is what she had to say about her cake. It is so encouraging to receive thank you notes especially from the young people who are the recipients.
"I wanted to thank you for making my graduation cake. I absolutely loved it! The frosting was perfect, the cake was perfect, and the design was perfect! You are extremely talented."