Tractor Cake Decorations I Am Making My Nephew's Birthday Cake And Need To Make Completely Red Organic Icing...any Ideas?

I am making my nephew's birthday cake and need to make completely red organic icing...any ideas? - tractor cake decorations

I know that you can use ice, sugar pink and green spinach are using, but I need so I dream of your red birthday cake can make a red tractor! Ideas or suggestions would be great!

Thank you!