Monday, 4 February 2013

FRICTION


4 comments:

  1. Friction is difficult (for me) but when you understand it is very interesting.
    Irene Regueira.

    ReplyDelete
  2. Hi
    I like the drawings there really nice.

    Melanie

    ReplyDelete
  3. I think friction is very interesting!!!!!!!!!!!

    ReplyDelete
  4. I liked all videos
    -Saul.

    ReplyDelete