How do you recycle the leftover clay from previous classes? In our class, the children place their remaining clay pieces into a black bag and I pour some water to soften the clay. After accumulating them for a few sessions, they would be soft to knead and wedge. Wedging the clay would prepare it ready for use by eliminating air bubbles and ensure a consistent texture. They would be packed into balls of clay right into the black bag again, sprinkled with some water to maintain moisture.