Headphones from Lexibook with an on-ear design that makes them rest nicely on your ears. They have clever buttons that you can use to quickly skip songs or answer a phone call.
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Lexibook HP010AV Marvel The Avengers Iron Man Stereo Headphone, kids safe, foldable and adjustable, pink/black
OnBuy
Lexibook HP010AV Avengers Foldable Stereo Children's Headphone - Volume Limiter
Robert Dyas
Lexibook Avengers Foldable Stereo Headphones With Volume Limiter