Are you making a cake for the fair? Sorry didn't understand this to well.
If you are and it's based on the shield above you could have a great time with coloured fondant. You could also have a white base Royal icing over the cake and then use pink and green ribbon around the out side. That would be really easy. I think I could manage that and I am no cake decorator although I like to give it a go for a special event :) Have fun!