Button Buzz Toy

This is a toy my Grandmother made me. I haven't made it yet for Karina. She's just turning 3. Maybe a couple more years...
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It is constructed by centering an object at the midpoint of a cord or thong (a large button works well) and winding the cord while holding the ends stationary. The object is whirled by alternately pulling and releasing the tension on the cord. The whirling object makes a buzzing or humming sound.