http://www.softschools.com/measurement/games/same_or_different/
Water Anaimals
http://www.fun4thebrain.com/preschool/underwatermatch.html
Animals, Shapes, Machines
http://www.funbrain.com/oddball/index.html
http://www.fisher-price.com/en_US/GamesAndActivities/OnlineGames/littlepeoplewhatsdifferent.html
Sesame Street
http://www.onlinemathlearning.com/same-different-3.html
IXL
Work Sheets
http://www.kidslearningstation.com/preschool/same-different-worksheets.asp
http://www.tlsbooks.com/funnyfishsameordifferent.pdf
Snap Dragon
http://www.bbc.co.uk/wales/snapdragon/yesflash/snap.htm
http://southjerseyacademy.com/cumber/pk-2.htm