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Silver and white balls ride on a snap-on headband and bounce whenever the wearer moves, which is the entire point of a bopper. Lightweight enough for all-night wear, they fit most heads, so they work as favors handed out at the door that people actually keep on.

• Colors: silver and white
• Snap-on headband, one size fits most
• Sold by the package (1 bopper) or by the case (12 boppers)