Thursday, January 10, 2013

How to make a Fossil Rock


An inexpensive "friend-gift" your kids can make. Share the excitement of breaking open a rock to find a dinosaur, animal, or a jewel ring! Easy to make in large batches, this would be a great option for a party favor as well.


Fossil or Treasure Rocks

This recipe was adapted from one found on Pinterest. Here is the link to her original recipe for Dinosaur Eggs

Yield: This quantity makes enough to cover about 2 dozen trinkets.

What you'll need:

  • 3 cup coffee grounds (used and dried)
  • 3 cup flour (or more)
  • 3/4 cup cornstarch (the original recipe called for salt, but I was out. This worked fine)
  • 3/4 cup sand
  • 1 and 1/2 cup water, or as needed
  • Also, a variety of small items to "fossilize." We were making them for a Christmas party where there would be boys and girls, so we used small dinosaurs and small jewel rings. We bought these at the Dollar Store in the party favors bins: 6 to 8  of them in each bag for $1.

Mix the dry ingredients in a bowl, and add the water while kneading until you have a nice stiff dough. Have your kids grab a hand-full of dough and hide a toy in it, adding pinches here and there and packing like a snowball until the toy is covered. After this we rolled them in extra coffee grounds for an extra "dirty" look. Place on parchment lined baking sheets (you really don't want sand where you bake cookies), and place in your oven on warm (150 degrees F) for a few hours, or until you crack open a test rock and it is completely dry.

We put them into cellophane treat bags with shredded paper and tied with a bow. Have fun!

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