Laboratory experiment: Listen & Download Laboratory experiment .mp3 Error! Change your browser, please! ⇓ Download Tinder brush surface ⚠ Turn on the laser sword ⚠ Warning System, Numeric Count, Female Voice ⚠ Supermarket Cart ⚠ Kick the bike pedals ⚠ Digital beep ⚠ The robot makes sounds ⚠ Whip pillow ⚠ Cut the air with a whip ⚠ Closes, Shower curtain opens ⚠ Ice crushing ⚠ The noise of the room, electrical appliance ⚠ ★★★★★