Nicholas Negroponte, chairman and founder of the Massachusetts Institute of Technology Media Labs showed designs for a sub-$100 laptop for kids in 3rd world countries.

Negroponte's non-profit One Laptop Per Child group plans to have up to 15 million machines in production within a year.
The Linux based computer is inside a rubber case and has a hand crank to generate power. Wi-fi and USB ports are also available.
I think this is a great idea to give kids all over the planet access to computer technology and the Internet. This can help change the world. More details on BBC News and on the $100 laptop site.

See also the Indian Simputer.