We have bird-feeders, along with birdbaths, too. It's neat watching the different birds migrate through, as well as many who permanently live in the area. It's cute watching them scold each other, fight over the "best" spots, flirt with each other, and also watching them training their little ones.
I keep binoculars on hand, and have a journal/pen nearby, and a slew of bird books and guides. Our whole family is into bird-watching now, including snapping pictures of any new birds coming through.