Are you making the cake in the shape of hello kitty?
I did this one and it was for a girl about that was 5...pretty simple cake. the lines on the 5 and butterflies was glitter gel so it sparkled some. I would make the butterflies and number a different color because they blend into the cake. the customer requested the design for this one
The reason I ask is because I made one for my daughter yrs ago. I mad it out of 2 9in rounds. I cut 2 inches off one of the rounds then cut it in half. Out of the other round I cut a 2in strip and put between the 2 halves to get the oval shape. Out of the rest of the other round I cut out the ears. Then frosted it. If I did it again I would use fondant. Not sure how much cake you need, but I layed hello kitty on a 9x13. Hope this makes sense!
I've heard through the grapevine (from a CS Rep for Wilton) that they will be coming out with a Hello Kitty pan with the new yearbook this summer. I know that won't help you out next month, but just wanted to put it out there. (there are more great new pans as well!)