A case of beer.
Gift Cards
You can buy fashionable and lovely clothing as a Christmas gift for a 20 year old girl at the Durant Square Mall in Oakland, CA.shopping online ,I think the brands good : oasap.com,forvere 21,H&M and so on,cheap and good clothes
That really depends on what their interests are.
A ring or flowers. Mabye a gift card to a store.
an iPod
A really cute Scarf and hat.
legos or transformers or a toy truck
Toys,iPod,basically anything electronic
A good Christmas present for your 15 year old girlfriend can include perfume, scented body lotions, and affordable jewelry. Another great gift would be a gift card to her favorite store.
a hamster with a cage :) Hamster $9.99 Cage $39.00
If the 11 year old is responsible, it is a good gift. They are a little pricey, so I would base it on how he has treated his other belongings previous to this.
iPod shuffle. They are often available for around $40.