One of our traditions is to give each teacher and staff member gift cards at the faculty/staff holiday party.
We ask each family to donate gift cards in what ever denomination they are comfortable. The cards are then combined together to give each teachers/staff member the same amount.
Some suggestions can be found on this wishlist, but cards from anywhere and for any amount are welcome. AmEx gift cards are also a huge hit. You can also drop off or mail gift cards to the PTA mailbox in the main office.