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Piaget's concrete operational stage experiments

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Uploaded by on May 8, 2009

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Category:

Education

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Standard YouTube License

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  • 0:50 excuse me please ? what did you say ?

  • why is this fo fucking gay?!?!?!?

  • Awww cute kid, love his accent!

  • i agree. thanks for posting

  • these are pretty interesting

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