I did this cake for my grand nephew's 3 birthday.....he loves hot Wheels so I did a marbled cake with my homemade buttercream.....I made the trophy out of fondant and gumpaste mix. The number 3 is from rolled buttercream and his name and the happy birthday is out of rice paper that I wrote on with editable markers...I also made the hot wheels logo out of the rice paper and markers, part of the road is out of fondant and the circle borders are fondant.