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Amazon.com: Light My Bricks Light and Sound Kit Compatible with Lego R2-D2 75308 (Set Not Included) : Toys & Games
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Electric, Sound Brick 2 x 4 x 2 with Light Bluish Gray Top and Doorbell/Dog Barking Sound : Part 55206c06 | BrickLink
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LEGO Sound Brick with Transparent Top and Revving Motor Sound (54870) | Brick Owl - LEGO Marketplace
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LEGO part 55206c06 - Dark Bluish Gray Electric, Sound Brick 2 x 4 x 2 with Light Bluish Gray Top and Doorbell then Dog Bark Sound (Set 5771) at BrickScout
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