Coghlan's The Original Audubon Birdcall for Kids is the real deal lots of fun for us grown ups, too. A gentle twist lets you create a multitude of sounds, to attract wild birds. weight: .72 oz 20.4 g Size: 2.5 x 1 Birchwood and metal Twist this remarkable birchwood and metal instrument to make a variety of sounds to attract wild birds. Handmade and individually tuned. With reasonable care the Birdcall will last forever. Keep the Call dry. The capsule contains powdered rosin a small amount of powdered rosin, added occasionally, will renew the Birdcall's voice.