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Feature
SIZE:8-2/3-inch by 6-2/3-inch by 1-inchMATERIAL:wood
FUNCTION:develops the abilities of brain,hands,eyes and logic
NICE for children above 6 yrs.
FIRSTLY make the white line up to down and down to up to fixed in the frame,then put the adjustment rod in the proper position and guide the shuttle(attached with lines) between the white lines at last