Marble (toy) conventions. Additionally, many glass artisans produce art marbles for the collectors' market only, with some selling for thousands of dollars. Marbles are made using many techniques. They can be categorized into two general types: hand-made and machine-made. Marbles were originally made by hand. Stone or ivory marbles can be fashioned by grinding. Clay, pottery, ceramic, or porcelain marbles can be made by rolling the material into a ball, and then letting dry, or firing, and then can be left natural, painted, or glazed. Clay marbles, also known as "crock marbles" or "commies" ("common"), are made of slightly porous clay, traditionally
Marbles Kids Museum funding from Wake County but was largely funded by corporate sponsorships of individual exhibits as well as the $5 per person admission price and memberships. In the summer of 2007, the two museums closed. Playspace moved into Exploris' building, and a new name for the combined museums was chosen. Marbles were selected to reflect the museum's unique two-story stainless steel wall grid inset with over 1.2 million marbles. The name was released to the public on September 29, 2007, the same day the new museum opened to the public. Marbles Kids Museum Marbles Kids Museum is a nonprofit children's museum