This was a fun cake for some friends of ours. Their twin girls are really into the Little Einsteins. The bottom tier is white cake with buttercream frosting and the top tier is chocolate cake with buttercream frosting. The blue color was made by the edible spray cans. The 4 characters were frozen buttercream transfer. Rocket on top was carved chocolate cake with buttercream frosting then polished off with a sucker for his antenna. The clouds, trees, & grass were all buttercream.