Interlocking rotatable assembly

An interlocking rotatable assembly comprising multiple interlocking pieces, and each of the interlocking pieces having

• a disk having two opposite side surface and an outer peripheral edge;
• a center hole disposed at a center of the disk and formed through the two opposite side surfaces of the disk;
• a mounting slit formed in the peripheral edge of the disk and extending along a radial direction of the disk, wherein two first inner side surfaces are oppositely defined in the mounting slit;
• two arms parallelly protruding from the peripheral edge of the disk and oppositely disposed beside the mounting slit, and each of the arms having
• a distal end;
• and
• a second inner side surface, and the second inner side surface of one of the arms facing the second inner side surface of the other arm, and connected with a corresponding one of the first inner side surfaces;
• and
• two engaging protrusions protruding from the second inner side surfaces of the arms respectively;
• wherein the disk of a first one of the interlocking pieces is inserted into the mounting slit of a second one of the interlocking pieces, and the engaging protrusions of the second one of the interlocking pieces oppositely engage in the center hole of the first one of the interlocking pieces.