DigiBirds Duet Tree Pack 100% Plastic We Tweet! We Sing! We Move! Now you can double the sing-sational fun of Digibirds with the Duet Tree Pack! This super-cute Digibirds duet can sing up to 20 melodies! Just place then in their tree stand and blow on the whistle ring! Digibirds get even better! When they're close they sing together. Collect multiple Digibirds and create a harmonizing choir! Digibirds are made for ages 5+ and batteries are included 2 Digibirds 1 Digibirds Tree Stand 1 Whistle Ring 1 Instruction Sheet 6 LR44 Batteries