That's so sweet! It really depends on your pocket book, but if it was me...
A few headbands, not too thick, the thin ones, in multiple colors. Available at dollar stores or even target.
Some Shea Moisture products, they're cheaper than Miss Jessie's, but if you want to go their the Miss Jessie's little sampler kit (upwards of 60$ I believe).
A spray bottle or two!
A few essential oils
A satin scarf/bonnet
I'm sure others will add to this, but this could be a good start for her!
A subscription to LHCF as a gift!!
Again, this is so kind of you to do!