xD You don have to. But you can if you want. Here are the most important things you guys must remember if you want to be artists
-The eye/jewel must match or contain a color of the parents eye/jewels
-You must only use the color codes they use, no using any other colors
-You don't have to add horns if the parents have horns, and they're always grayish
-The add ons don't have to be passed on to the kit, and they don't always have to be the same
-The designs must be similar to the parents
-Any edit to the body, not including add ons, may or may not be passed on
PPS ones are still on trial in my mind of how to get xD for now, use a number generator 1-50 if you find one. If it lands on 25 or 45, it's PPS
And all of you are artists for the nursery ^^