Awww thats sooo cute! I was thinking the same thing for my daughter, getting the lobster clasp as well. The idea I had for her is to get one bead a year for her but right off the bat I want to get her the letter "L" and maybe the teddy bear? (she loves the teddy bear her big brother got her, its her favorite toy).
It is soooo much fun to buy Pandora for a little girl. My 5 year old has one and she loves to pick out charms she wants. She has the initial "A" as her center bead. I don't have too many on her bracelet yet due to the weight but it's nice to know that we can keep adding to it as she gets older.