Monday, April 23, 2012

Doorbell Sounds Like A Knocker

See how it works:



Bobby Petersen

2 comments:

  1. Sue Dunham10:33 am

    http://www.youtube.com/watch?v=t9K9wiH2Lko

    ReplyDelete
  2. Sue Dunham10:34 am

    What knockers! Thank you Dr.

    ReplyDelete

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