In my experience, talismans and amulets should always stick with one goal for best results. If you want charms to protect against spirits, attract love and attract spirits of light (solar) then you would need three different charms. It would make a delightful charm bracelet! :)
I really enjoyed riffling through Judika Illes Encyclopedias for some interesting and fun charms from around the world. Some are specifically for pregnancy and babies, which would be perfect for not only your nephew, but the mother to be right now. I copied down a few of them here a while back when an expecting mother asked for ways to protect herself and unborn. They're big books but nearly every bookstore I've ever been to carries one. Just grab a coffee and a comfy chair there and sift through the monster books (they really are huge).