Caterpillar

My son has adopted a fuzzy caterpillar, found outside in the yard yesterday afternoon. He feeds it green leaves and gently strokes it's fur, and ignores it for all but a few minutes each day. (From the caterpillar's point-of-view, this is probably all for the best.) He knows we can't keep the caterpillar inside in a plastic container forever, but I'm more than willing to indulge his interest for a few days.