Bubble Glazing with the kids this week. Mix soap and water with underglaze. Darker colors on white clay show up best. Use a long straw to blow into the tray of soaped up underglaze, until it builds up plenty of bubbles and suds. Then, lower the plate into the bubbles and pop them all over the surface of the plate. Be careful not to lower it all the way into the underglaze mixture. Clear glaze over the top and fire.