IN A ( REST HILL Ceramic studio. Jean Kristofer lifts a nude statue of David from the curing and baking oven while \nita Niffenegger lt;r checks on her Halloween pumpkin done in ceramic. The show is to be held from 1 to S on Saturday and from IWto H at the Senior Services ( enter. 311 North Ottawa St. in Joliet.IN CRYSTAL LAWNS (Plainfield Twp.), Connie I lav wood is overseeing the sgraffito work of Carleen Vogen (I.) and Joan Scheldt’s cleaning of greenware. It is all part of the preparation for the Tri County Ceramic League's llohhv Ceramic Show and Exhibit slated for this Saturday and Sunday.