Goki Children's Musical Instrument - Kazoo, Blue

Kazoo by Goki is a type of musical instrument consisting of a tube with a membrane inside.

When air is blown into it, the side closer to the membrane begins to vibrate in a strictly defined way, producing sounds somewhat similar to those of a harmonica. Producing sound is not easy: you need to "blow" the syllables "hu", "tu", "bu" into the kazoo.