Test your reaction time. Quite an addicting game.
http://www.bbc.co.uk/science/humanbody/sleep/sheep/reaction_version5.swf
Though not as addicting as a game previously posted on the board:
Test your reaction time. Quite an addicting game.
http://www.bbc.co.uk/science/humanbody/sleep/sheep/reaction_version5.swf
Though not as addicting as a game previously posted on the board: