Place Value

http://www.sheppardsoftware.com/mathgames/placevalue/value.htm --free game and lesson without audio.

http://www.sheppardsoftware.com/math.htm#placevalue --free games without audio.

http://www.studyzone.org/testprep/math4/d/placevaluel.cfm --free lesson without audio.

Note:  learningupgrade.com has several good place value lessons in the grade 1, 2, and 3 areas.  One or more of these lessons could be accessible with a free 7 day trial.