Cake colors

Alice wanted to help decorate Zac's cake, but I didn't do it until she was in bed, because I had a plan.  I always love colorful cakes, and I wanted to do something with the idea that 36 was a square number.  I finally settled on making 6 squares with six colors in each square, for 36 units, spelling out "ZAC 36!!!"

Zac was in bed by the time I finished, so he had to wait until his birthday morning to see it.