Click on the calculator buttons: Listen & Download Click on the calculator buttons .mp3 Error! Change your browser, please! ⇓ Download Pen Writing, Ink Dipping ⚠ Ballpoint pen machine, press a button, write ⚠ Tear off tape ⚠ Removing the ballpoint pen cap ⚠ Ballpoint pen ⚠ Pressing a button on a ballpoint pen (on a ⚠ Scissors cutting paper ⚠ Stamp, Plastic seal ⚠ Electric pencil sharpener ⚠ Put the cap on the marker ⚠ Eraser ⚠ Hole puncher ⚠ ★★★★★