try these
http://www.clickmazes.com/planks/ixplanks.htm
lots of other puzzles there aswell
productive day at the office i see ?
Naah, Ninja and http://www.totallytricky.co.uk/ are still my favourite wastes-of-times-at-school...
Oh, and www.miniclip.com... they have a FEW okay games, but it's free...
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