Share yours too. Share yours too. Share yours too. The bottles have texture to them with a picture of a log cabin on the front and they're kinda' shaped like a cabin. Cover the design with paper, taping down the edges.
Children then do a crayon rubbing across the top of the paper allowing the design to come through.
I like to demonstrate how to do this first because if children rub too hard, the pennies get moved around underneath the paper, yet, they must rub hard enough for the design to show up, so it can be tricky. Still, I've found that most kids love doing this activity.