This was my first stacked cake, for my son's 2nd birthday. It is buttercream, with fondant decorations (first time working with fondant). Living in the tropics, I had some problems with the humidity, but I really like working with the fondant! There was suppose to be a red "2" candle in the center between the toy cars, but it was stolen by a rat! I was so mad! We found it under the oven later that night, so there ended up being an empty space on the cake. Oh well. :)