Measure a 4-foot long square in a sunny part of your garden. Loose the dirt about 6 inches deep with your shovel. Remove weeds, rocks and debris from the area.
Lay the bamboo poles side by side. Tie the poles together, 8 to 10 inches from one end, by wrapping garden twine around four or five times, then tying a knot.
Stand the bundle of poles upright in the center of the dug-up square of garden space. Gently spread the untied ends of the poles outward, toward the edges of the cultivated area, to form a circle.
Widen the distance between two of the poles to 2 feet to create a doorway for the teepee. Adjust the remaining poles so that they are spaced an equal distance from each other. Press the bamboo pole ends 6 inches into the ground.
Plant runner bean seedling plants at the base of each pole. Water the beans routinely and pull any weeds that emerge. When the bean plants have climbed a foot up the poles, spread a 4-inch layer of straw around the area to retain moisture in the soil, suppress weeds, and provide a comfortable floor inside the teepee for playing.