It made George and Alice just a wee bit nervous, but their five guests walked up onto the steep roof anyway, and it was so much fun! Rolf, in the white hat, led the way, and explained the terrain from the peak. I climbed up after Ada. Rolf lost his hat in the wind. (The Kansas wind! It's invisible in photographs, so this is good evidence.)
The house is sheltered on three sides, a blanket of land around its shoulders. Three-quarter earth-covered houses often have one side open to the south, as this one does, the solarium, to capture light and heat. It's very energy-efficient. And excellent to play on.