This activity explores differences in children’s effort when praised for “hard work” or “being smart”.


Presentation Type: Experiment

Age group(s): Children (9 to 11-year-olds)

Time: 7-10 min

Scientific Topic(s): Psychology; Developmental Science

Supplies in Library Kit:

  • 1 set of puzzle blocks (in “Blox Fun” box)
  • 18 small (2×2) puzzle cards
  • 12 large (3×3) puzzle cards
  • Praise Instructions

Additional Resources:


This kit comes from the Living Laboratory and was developed at the Maryland Science Center. Click here to learn more about the Living Laboratory!

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Posted on

April 22, 2019

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