"I'm going to be 13!"

Since Julia's birthday is coming up in just over a month, we are trying to explain to her how she is going to be turning 3. Last night Jerrod and I were talking about her birthday again and how she is going to be 3 soon. Julia thinks about it for a second and says "No, I am going to be 13!". We try to explain to her that she is going to be 3, NOT 13. But she insists that she will be turning 13 on her birthday! She sure acts like she is 13 somedays!! But, dear Julia, we don't want you to grow up that fast! We are struggling with how fast you are growing up already!