Monday, February 19, 2007


Jenn and some of her engineering friends came to teach the kids about construction. They brought safety equipment and pieces of rebar and showed slides of construction and a movie of work on the Bay Bridge (with the construction worker comments mostly deleted out!)

They also taught the kids how to make concrete by a cookie analogy. It was awesome. The analogy goes like this:

  • Crushed Nilla Wafers = Large Aggregate
  • Instant Oatmeal = Small Aggregate
  • Brown Sugar = Sand
  • Cornstarch = Cement
  • Honey = Additives
  • Water = Water

Mix it all up, roll it into a ball, let it dry, and... voila! Concrete cookies!

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