I made my 2 year old Grandson this racing car cake. It was made with 2 round butter cakes, I cut one 3cm side off one (I ate that) the same off the other one, joined the flat sides together then added the cut off piece to create a bridge. 1/2 the butter cream icing went on the sides and then added cocoa to the other 1/2 to the top and across the bridge. Bullets were used for the road sides and tubes of edible icing made it easy to decorate. The decorating icing came from Woolworths.