Casagami's tiny model homes are made of cardboard and shipped flat in an envelope, saving on shipping and energy costs. To make this even more of a feel-good gift, the cardboard can be recycled, and the company employs people with special needs. And, they're affordable; the basic model, shown above, is just $7.92 (though shipping doubles that amount, it still feels like a good price.)
Place your assembled house on a windowsill and let it charge in the sun. Each hour of sunlight equals an hour of light. (There's an on/off switch.) They're meant to act as night-lights.
I love the many different styles of homes they offer, like this Alsace chalet, and this ultra-modern dwelling.