"Welcome to the Siblings Club! I'm so excited to have a new cousin, and I know you're excited to have a baby sister. I was even younger than you when my little sister was born; you will be seven, but I was only 5 1/2! I know what it is like to have a little sister, so I want to give you some advice!
Don't be nervous. Right now, you're probably feeling really nervous. You've never been a big sister before! You're probably wondering if you'll be a good big sister. Don't worry! I know you'll be a great big sister because you're such a great little girl. Before my sister was born, I was nervous too, because I didn't know what it was like, and no one had any advice to give me! My mom was an only child, and Daddy was a big brother to three other siblings! I also thought the new baby would take away all of Mommy and Daddy's attention, and they wouldn't love me as much anymore. But that's not true because every parent has enough love in their hearts to go around.
Being a sister is so much fun! Having a sister is so much fun because she's a playmate\friend that you have around all the time! When my sister and I are in the car all day driving on long trips, we share toys and watch movies together. On trips when we share an air mattress to sleep on, we annoy my mom and dad because we giggle all night long! Life is never lonely when you have a sister.
Babies are a lot of work and your mom will need some help. You won't remember when my sister and our other cousin were babies, because you were a baby too. I got to help Mommy out a lot with with my sister. I helped entertain her, and once I even changed her diaper. I also remember helping to give the babies baths.
Babies are also so much fun, though, and they're cute, too! Our family has had a lot of very cute babies, so your sister is going to be so cute, too! Babies are like real live baby-dolls. My mom LOVED dressing up my sister, and her outfits were so adorable. Babies are also so small, and it's so cool to watch them grow up.
You can teach your sister a lot of things! You love so many things: dinosaurs, superheroes, horse-back riding. You can share these interests with your baby sister! This way you'll have something in common. You can teach your sister how to do SO many things. I taught my sister how to use the computer, and I teach her a lot of things in the Art Studio. Just don't teach your little sister bad things.
You are such a sweet little girl. I hope you know you can call me or e-Mail me OR write me a letter anytime you want, and if you have ANY questions you can ask me. Do you know what? You and I are very similar. We're both older sisters to little sisters! Anyway, you and your little sister will have to learn how to be sisters together, just like my sister and I did. Along the way, there will be times when she is just downright annoying (I know the feeling), but at the end of the day, just know that you both love each other very much and your parents love you too! You'll be a great big sister and a wonderful role model."
Did I mention my girl's 12? Pretty proud of her! She even added the picture above to the e-mail she sent her cousin -- it's a picture of my two girls on the day my youngest was born. And yes, I may refer back to this when they are, as my girl put it "downright annoying" to each other! ;)