Building a suet feeder is a great project for children (and adults, too). They are simply a 12-20” section of about 6” diameter log with 1” holes bored into it (see photo above with Downy woodpecker). Birds like nuthatches, chickadees, downy woodpeckers, flickers, and even the brown creeper this year, really like them. I imagine the dead log, with bark, is a natural search image for them while foraging for food. The suet in the cavities probably comes as an unexpected treat.
For now, I still have a few feeders, and I will continue to feed birds in the winter, and some, like hummingbirds, in the summer. Though, in the future, I will probably have fewer feeders.