1.      Smile (name) It's your birthday!

2.      (name) Start your birthday with a smile - or 10!

3.      Thanks for the (age) years of smiles! Happy Birthday

4.      We're grinning ear-to-ear cause it's (name's) (age) birthday is here!

5.      We wanted to start your birthday off with a smile!    

6.      Smile, it's (name's) birthday today!

These are only suggestions. We can put your own special message on the sign.