Ok, I have a 3d school bus that I want to make...*fingers crossed* if not, then its gonna be a sheet cake.

how do make the bus windows?...do I pipe it on with gel and fill in with icing (gray color)...do I make them out of gum paste? and if I do, is it edbile? what does it taste like?...royal icing...shouldnt I have done it already if the cake is due friday at 10am???

I NEED AN EASY AND FAST WAY TO DO THIS...'

THANKS MY FRIENDS

Just giving this a bump up so someone can help you out. I'd like to know too because I have my first 3d car coming up and I'm wondering what to do for the windows also.

You can do it either way......
Word of caution: piping gel has a tendency to run if not flat I would pipe gray/light blue b'cream then lightly coat w/piping gel.
Or you can cut light gray fondant & allow it to dry. Either way will look nice.