Handmade Oriole feeder: Use an upside-down Yankee Candle lid, some wire, & you have an Oriole feeder. They like grape jelly & orange halves. You could even make it fancy by adding beads & such on the wire as you're twisting it!
Several DIY Gifts For Birders - Homemade gifts add a personal touch that comes only from making something yourself. Combine that with the trendy green movement, and you've got yourself a top-notch gift.