The most common beginner's practice nunchaku are made padded with rubber foam. Colloquially, such nunchaku are known as foamies. Since this type of nunchaku is made by a range of manufacturers, the quality and specifications may vary widely. The core can either be made of plastic or wood. The nunchaku come in both ball bearing chain and cord variations. Generally the sticks of these nunchaku are either white or black and often have a dragon printed on them.