My dear …
Today is your birthday, and I hope that you have a great day! Birthdays are days that make us so happy! I will always remember how happy I was to meet you on the day you were born. When you looked up at me with your little eyes, you melted my heart and I have loved you so much ever since that moment.
I don’t know if you know this or not, but there is something very special about grandchildren. God really knew that they would be the best gift a grandparent could ever get. Let me tell you a little secret … a __(grandson/granddaughter)__ is even better than having your __(name of favorite toy/truck/doll/etc) __!
I hope that your birthday is really fun and that everybody makes you feel special and loved …because you are very special and you are very loved! Happy Birthday, __(name)__!
With all my love,