For Sam’s 7th birthday, he wanted a Terraria blood moon cake. Apparently, when there is a blood moon, a lot more zombies come out and there are some kinds of zombies that only appear in the blood moon. So we settled on a design where the moon changed from blue (regular moon) to red (blood moon) and a bunch more zombies rose up out of the ground.
The characters are handpainted gumpaste. The blood moon zombies are all mounted on metal tubes that are attached to a little platform. The platform is lifted by fishing line attached to a wooden dowel, so that when the dowel is pulled out, the zombies rise up for the blood moon and when the dowel is pushed in, the zombies sink into the ground for the regular moon.
Sam also wanted his Terraria avatar and the guide NPC, so I included a little house made of gingerbread where they can hide from the zombies and mounted them on a track so they can walk back and forth.
The backdrop and the moon are light boxes with lids of plexiglass covered with fondant. Inside, are rows of red LEDs and rows of blue LEDs. The LEDs are wired through the platform that raises and lowers the zombies, so that the blue LEDs light when the platform is down (regular moon) and the red LEDs light when the platform is up (blood moon).