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Already checked? You can find even more exciting videos in the Checker World of the ARD media library: https://1.ard.de/checkerwelt. ???? Tobi checks how waves are formed and how to ride them. He also records the sounds of waves and turns them into his own song! *Unfortunately, comments are disabled to protect minors. You can email questions or comments to [email protected]. Enjoy the video! ???? ???? NEW! Checker Tobi is now also available to listen to. The CheckPod in the ARD audio library: Checkpod at http://www.ardaudiothek.de/kinder