Perhaps to hard for second grades in ten minutes (second grade == 2. Klasse, ~7-8 years?) but a nice idea is Human Tic-Tac-Toe.
Please see also "The Pattern on the Stone" by Danny_Hillis about Tic-Tac-Toe and the famous Tinker Toy Computer ;-)
Regards, Karl
«The Crux of the Biscuit is the Apostrophe»
In reply to Re: OT: Teaching Second Graders Programming
by karlgoethebier
in thread OT: Teaching Second Graders Programming
by Limbic~Region
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