Unicorn + Dinosaur

Our twins just turned six.  We have one boy and one girl.  They are definitely not identical twins (see above gender reference).  
When discussions regarding their birthday cake began, one child was set on a dinosaur theme and the other was desperate for unicorns.  In her infinite wisdom, their mother introduced the concept of a hybrid cake featuring both options. Our world is desperate for more compromise. There are lessons to be learned from this cake. 
Although it did solve our initial feud, this magnificent cake sparked a more urgent debate.  Should it be uni-saurus or dino-corn?