Watch this video to see how a water mill works:
(3:39) https://www.youtube.com/watch?v=rauJq_LTMYI
Watch this video about a blacksmith in his shop at Old Sturbridge Village:
(2:15) http://www.osv.org/video/video-blacksmith-shop-at-old-sturbridge-village
You can look at pictures of a wind mill here:
http://www.history.org/media/slideshows/windmill.swf
Turn and talk to your partner about: