Practice Cake

We spent Grandma's birthday at her house with her and Grandpa. It was lots of fun and we got to eat cake again!! Mommy made something she called a "Practice Cake" and then she would look at it and laugh. We aren't quite sure what it was all about, and we're just glad we got to eat some of it. Here's a picture of the cake. Can you tell what it's supposed to be? Mommy made us black out the number on it so that you don't know what age Grandma just turned...