This is a video of the transforming Optimus Prime cake that father Russell Munro built for his son's birthday. He 3-D printed all the plastic parts of Optimus's body that hold the cake. Pretty impressive. When I was growing up I was lucky to get a cake at all. Usually my parents forgot my birthday until I reminded them then my mom would just put candles in a loaf of bread. I talk about these things at therapy.
Keep going for a video of Optimus transforming and not rolling out.
Thanks to Delgado, who wants a birthday cake made out of individual cupcakes that come together to form a giant Voltron cake. Wow, it sounds like your dad has his work cut out for him.