Be sure that you choose things that can be wiped down or sterilized easily since, after chemo she will have a very weak immune system and not be allowed contact with a lot of things. Some things the hospital recommends are
Thick soft socks
Warm fleecy blanket
Knitted hat
Hypoallergenic, all-natural hand and body creams
All-natural soaps, shower gels and shampoos (fragrance free)
Gentle toothpaste (try Tom's brand, very good, also their mouthwash)
Colloidal oatmeal soap
All-natural healing lip balm
Mints, lemon drops and gum
Peppermint tea
Green tea
Ginger tea
Ginger capsules
Queasy Drops
A mug with an encouraging message
Packets of instant chicken noodle soup
Plain crackers, sugar cookies, low salt nuts, dried fruit
like figs, pineapple, cherries, blueberries
Healthy, all-natural, organic, preservative free treats like Yum Yum Snacks
Crystallized ginger
Gourmet peanut butter like PBLoco
Audio books
MP3 player or Ipod
Selection of notecards with pre-stamped envelopes
Prepaid phone calling or SMS gift card
Gift certificates for restaurants that deliver
Books or magazines they will enjoy or be inspired by (suggestions below)