Ok! This is a small comb. check the length and consistency of her hair, and that can help you adjust the length accordingly.
1) Find a chunck of tightgrained hardwood.
2)find another of the same wood or contrasting color to use as strength across the top
3)glue the to together. When dried, using a band saw or scroll saw cut the basic shape and the teeth.
4)trim the teeth to the shape you want, making sure the tips are perfect so they don't grab hair.

5) Carve your design in the blank space and then sand smooth.
6) I like to use an oil finish or a gloss. Depends on the look your after.
7)

pictures so we can see!
Oh! Make sure you choose a color that contrasts well with her hair.
