Decoy calls are explicitly named in this heading's description, so they are classified here rather than under sporting goods or hunting equipment headings. The key is that the article functions as a sound-producing device designed to mimic animal calls.

If the article's primary function is amusement as a toy and it is designed principally for children's play, it is likely classified in the toys chapter. Articles here are intended as musical instruments or signal devices, even if simple or novelty in nature. When an article straddles both uses, the principal function and the product's marketing and design are the deciding factors; a binding ruling may be warranted.