How do I turn the sound on or off?

To turn the sound on or off in Mammals, Me, Infinite ArcadeThe MonstersThe Robot Factory, or The Everything Machine, turn the sound on or off on your device. 

To turn the sound on or off in The Human Body, Plants, Homes, Simple MachinesThe Earth, Weather, or Skyscrapers:

  1. While playing the app, tap the key in the upper left to open the toolbar.
  2. Tap the gear at the top to reveal six icons.
  3. Tap the volume icon in the middle left to turn sound on and off.

Last edited on November 13, 2015

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