Description: brand new and high quality Choose any external gear, In the two inner circle You can draw different graphics Right hand holding a ball-point pen insert pen perpendicular to the paper, in a certain direction, to draw a beautiful curve pattern pattern. Note that the internal and external tooth should for always rely on tight. Need to change into another or more than two gears, gear were successively on the original painting, constitute a more complex patterns, pay attention to, when to change gear, don'for t letinternal gear to move. Use combination illustration, can draw ten million different decorative pattern curve pattern. If use different color painting pen cap, decorative pattern looks more beautiful. Primary school students the best intelligence toys, can cultivate the habit of corretly. Hands and brain, the development intelligence, the fun. Can easy to quickly draw a complex pattern tens of thousands of fantasy. Can free combination, more for play to space. Specification: Style: Sent at random (if you buy more than one product,the color and style may be different or the same) Material: Plastic Size:Length: 20cm(7.87in),Wide:10cm(3.94in) Color:Blue/Orange/Yellow/Purple Quantity: 1Pc Note: Transition: 1cm=10mm=0.39inch Please allow 1-2cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes:(Without retail package) 1 x Ruler(other accessories demo in the picture is not included.)