US Energy Information Administration
U.s. Eia: Energy Kids: Renewable Energy: Solar
This is a resource on solar energy, photovoltaic energy, solar thermal heat, solar thermal power plants and other forms of energy.
Energy for Sustainable Development
Esd Bulgaria: Kids & Energy: Solar Energy
Explains what solar energy is, how it differs from photovoltaic energy, and how it is harnessed to produce electric power for humans.