First came the birds and they built nests. (Build a pile of dried weeds and teensy-weensy twigs; make it messy, thick but not compressed.) Next came Native Americans, and they built tipis. (Build a small tipi around the nest using sticks about pencil diameter.) Then came Europeans, and they built log cabins. (Build a log cabin tightly around the tipi using sticks slightly larger than the ones in the tipi.) Put a match to the bottom of the bird nest. Have a pile of bigger sticks ready to add as the fire grows.