Start with a wooden basket that is 8 or 12 inches in diameter. Gather a bundle of birch branches. Cut off the fine tips, then cut the branches into varying lengths (6 to 12 inches).  Using 24-gauge brown wire, secure the end of a branch to the base of the basket. Bend the branch along the basket's curve, wiring every 4 or 5 inches so that loose ends stick out. Repeat with remaining branches, overlapping them to conceal the basket.