Fossil Cookies

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What You Need:

  • Refrigerated sugar cookie dough (Buy this from the store, or for more math fun, measure and make your own cookie dough using any standard sugar cookie recipe.)
  • Assortment of clean, small objects to use as fossil imprints. (These will be the “fossil-makers!”)

What You Do:

  1. Help your child cut or form the cookie dough into circles. Press or roll the dough circles until each is about one-quarter inch thick.
  2. Show your child how to firmly press a “fossil-maker” into the center of each cookie to leave an imprint. Spraying objects lightly with pan spray before pressing into the cookie will keep the dough from sticking to the object.
  3. Bake the cookies according to recipe or package directions.
  4. Wash the “fossil-makers” and save to use for matching to imprints when the cookies cool.
  5. When the cookies cool, ask your youngster to match the fossil-maker to the fossil imprint in each cookie.
  6. Discuss with your child how cookie-making relates to fossil imprinting. You can explain that the cookie dough is like the mud that real animals imprinted with their footprints, bones, and bodies. The mud “baked” or hardened when other layers of mud covered the “fossil-maker," creating imprints. Scientists today match the animal parts we know to the unknown imprints to identify the creatures that made them. That's how fossils can show us what kinds of animals and plants used to exist on this planet.
  7. Eat and enjoy your newly made "fossil imprints"!

As an extension, you can introduce your child to the old-fashioned fun of mudcakes. Use the same procedure to create imprints, and allow the mudcakes to dry in the sun.

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