Graphing:
Furbles: http://www.ptolemy.co.uk/furbles/furbles03
Tool:
http://nces.ed.gov/nceskids/createagraph/default.aspx
Questions:
http://www.canteach.ca/elementary/numbers13.html
http://www.kinderpond.com/graphing.html
http://michellef.essdack.org/sites/michellef.essdack.org/files/Graphing%20Questions.pdf
Telling Time:
http://www.time-for-time.com/swf/myclox.swf
http://www.netrover.com/~jjrose/time/Time.html
http://www.bbc.co.uk/wales/snapdragon/yesflash/time-1.htm
Estimation
http://phet.colorado.edu/en/simulation/estimation