|Hello Kitty is an example of a licensed cake decorating product|
of which Bakery Crafts is a licensee.
This article from Modern Baking explains the concept and process of copyright laws and cakes, as well as describes how a cake decorating product is developed for the licensee. And when a customer begs you to do a registered trademark design or image on a cake, it will help give you answers to their questions.
Don't Hate Copyright Laws
Love them or hate them, copyright and trademark laws exist for a reason, and it behooves bakers to comply with them.