Luna and Marco live in Italy. In Italy it can get hot. It gets so hot that the computer they use overheats. Their computer only works early in the morning and late in the evening. They can push at the edges a bit because Marco found that an Ubuntu live CD gives them some more time then Windows XP does.
Their mother, Luna and Marca are five years old, also has a computer. Her computer only works reliably in the hot Italian summer with an external fan pointing at the computer. The computer is raised a bit from the desk to improve ventilation even further.
In all the talk about computers something simple like the environment is hardly mentioned. PC's and laptops are thought to work in an office environment. In an office environment it is expected that the temperature is regulated.
The OLPC is made for kids and it will work in a hot environment. Luna and Marco would love to have one. It is sad that their mother has to use a computer that cannot take the heat and, a computer that is not as cool.