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Amazon.com: Sphero Specdrums (2 Rings) App-Enabled Musical Rings with Play Pad Included - White (SD01WRW2), Package may vary : Toys & Games
Specdrums: Music at Your Fingertips by Specdrums — Kickstarter
Sphero Specdrums (1 Ring) App-Enabled Musical Ring with Play Pad Included - Create Sounds, Loops, Beats for Musicians of Any Skill Level - STEAM Educational Music Toy for Kids, White : Toys & Games - Amazon.com
Sphero Specdrums let me turn CES carpets into sweet music - CNET
Sphero's Specdrums rings bring beatmaking to your fingertips