The Nicholas Negroponte program "One Laptop per Child" which was designed to "empower the children of developing countries to learn by providing one connected laptop to every school-age child", has a special program going on through the end of the year.
If you buy one laptop for a child somewhere in the world, you get another one for free. You can keep this one, or give it to a child you know, or donate it, etc. Or, you can simply buy one and let them send it to a child in need.
The all in cost (with shipping) is $423, but $200 is tax deductible. Plus, you get a free year of T-Mobile Hotspot access with your purchase.
PC Mag has a great review of the OLPC XO-1.
This is a good way to do something good this holiday season.