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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. ???? Checker Tobi checks everything, from grain to bread, but also why you dip pretzels in a poisonous lye and why bread remains flat without yeast. * Comments are disabled to protect minors. You can email questions or comments to [email protected]. ???? Checker Tobi is now also available to listen to. The CheckPod in the ARD audio library: Checkpod at: https://www.ardaudiothek.de/rubrik/fu...