Colleen's of Medford Square is offering a beginner- and family-friendly Clay Mug Making Pottery Class led by Pottery with a Purpose. An expert instructor will cover all the basics, and with step-by-step instructions, you'll learn how to hand-build from clay one to two ceramic mugs or espresso cups to hold your favorite chilly weather drink. You'll also learn how to add cool surface decoration as well as handles to your clay creations. Your pieces will then be professional fired and…