Man, where do I start with this cake?! This 3D motorcycle was requested by a super fun couple for their wedding cake! It was by far my biggest and most challenging cake (3' long wheel to wheel by about 1.5' to the top of the seat)... I was very upfront about this being a new challenge for me but they went with it! While they were absolutely thrilled with the result, this is the first and last motorcycle cake I will ever make, lol! I'm pretty happy with it, but because I ran in to many unexpected problems with it's construction, I was rushing at the end and it is not as neat as the standards I hold myself to. If I could work on it for a month, I might have been add all of the details I wanted but, I finished, and I survived! The engine part is cake, the seat part is rice crispy treats, and the wheels are a combination of foam and rice crispy treats... the handle bars and struts are PVC...