My 3 yr old saw a picture of a similar cake while I was on Pinterest and asked if I could make her a rainbow cake for her birthday. I was thrilled to see how vibrant the colors turned out and the look on her face when we cut into it was just priceless! :) I used a sour cream vanilla cake and gel food coloring. Covered in Satin Ice fondant. Decor on the outside are fruity twizzlers.