What is this wooden or bamboo thing that whistles when you pull it hard?

This is called a firecracker! There are also plastic ones!

Traditional folk games

Made of bamboo and wood, hollow, hence the name, the Qing Dynasty was mixed with the empty bell, commonly known as the ringing gourd; Jiangnan is also known as the pull bell. Shake bamboo is both young and old games, but also acrobatic performances. In China has a long history.

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Playing: a string attached to two short bamboo sticks at the end of the pole, it becomes the tool to shake the air bamboo. Shake, put the rope in the hollow bamboo shaft in the concave, and then around a few times, lift the hollow bamboo, rely on the two arms alternately coordinated shake, the hollow bamboo gradually accelerated to rotate up, shake the turn, can be placed on the ground upside down, that is, rotating non-stop, more buzzing, such as the bells aftermath, but also can be transformed into a variety of other patterns. When the sky is clear, come to the park, rain and snow days at home, without being limited by the venue and the weather.

Benefits: Individuals playing can move all the joints of the body, exercise body coordination. Children play, enjoyable, but also promote bone growth, brain development; the elderly play, can be strong body, treatment to reduce frozen shoulder and eye disease. Playing in a team can increase the fun and competitiveness of the game. A long time, let a person's legs light, hand fast, eye fast, brain fast, this is the "light three fast" function of the air bamboo.

Wuhan An Ji Te for your answer