Aeronautical Biplane Propeller Seed Spinner

Construct the fuselage using a hollowed-out cedar block to serve as both the primary seed reservoir and the structural body of the plane. Ensure the interior is finished with a non-toxic sealer to protect the grain from moisture while keeping the food safe for birds.

Carve the dual-wing assembly from thin strips of mahogany, using a slight dihedral angle to provide stability and a classic vintage silhouette. Secure the wings to the fuselage with waterproof exterior wood glue and brass finish nails for longevity.

Fashion the functional propeller assembly using a ball-bearing pivot mounted to the nose of the plane, allowing the blades to spin freely in the wind. Incorporate a small internal chute that aligns with the rotation, letting seeds trickle out onto the landing tray below whenever the propeller catches a breeze.

Apply a final coat of spar urethane to the entire structure to provide a weather-resistant finish suitable for outdoor exposure. Install a stainless steel hanging cable through the top center of gravity to ensure the plane remains balanced during flight-like suspension in your garden.