In theory, fly-fishing is a simple sport: Pick a body of water, choose a fly-fishing rod, select your “fly” (or bait), tie a secure knot, cast your line and, hopefully, land a fish on the other end.

Why purchase a new fly rod when you can fish one with the satisfaction of knowing you’ve built it yourself. The class will be held seven consecutive Wednesdays at 6 p.m. Central time, starting Jan. 10 ...