Well, if she is going off to Boot camp she will not be able to bring anything with her. This will give you more time if you decide to make her something. She won't be able to have any personal effects on her until after she graduates from Boot Camp.
Stationery and stamps I think are allowed. She may take a small bible with her.
When my son was in boot camp we bought him an ipod and loaded it with everyone's music and a couple of movies. When he graduated we gave it to him. He really appreciated that.
My daughter really enjoyed a quilt I made and sent to her in both Iraq and Afghanistan when she was serving over there.
I'm sure others will have some great ideas.
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My newest Grandson, Caleb Austin, was born May 29th. I am now Grandma to 4 precious babies. I am so blessed!!!!