title: How can I create a growing object in WebGL and Three.js and Tween.js
body: <p>I am new to Three.js and Tween.js. 
  And I want to create an animation which an object could "grow": like an animation of 3D ball grows into a tube (or the 3D ball been dragged into the tube).</p>
  
  <p>Can this been created by THREE.ExtrudeGeometry and Tween.js? If yes,
  can I have some detail explanation or simple steps for this? </p>
  
  <p>I'll be really appreciate for any better ideas.    :)</p>
  
  <p>Thank you very much.</p>
  
  <p>Brs,
  Bryan</p>