Katherine Webber, left, walks Kendall Croteau of Portland through the process of assembling a “geology parfait” Tuesday as part of “Reading Rocks,” the Lewiston Public Library’s Summer Reading Program. The ice cream parfaits were built in layers to represent the layers of the Earth, with a cookie core, brownie tectonic plates, sprinkles for the ocean and animal crackers for the animals. (Andree Kehn/Sun Journal)