Amazon.com has a Transformers Optimus Prime Voice Changer Helmet for $11.99 with Free Shipping on $25.
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- In the voice-changer helmet, your child becomes Optimus Prime, noble leader of the Autobots n
- Helmet transforms wearer’s voice to make it sound just like Optimus Prime n
- Movie-accurate replica of Optimus Prime; finished with vivid colors n
- Adjustable head straps allow helmet to fit all head sizes