How to play: <br> Use an ordinary dark colored crayon or marker to draw a line on a white piece of paper.<br> <br> Turn on switch on the button of the car. <br> <br> Place car on top of the drawn line. <br> <br> The car will run on the line automatically. <br> <br> If the line finished, the vehicle will continue in the direction followed from the previous line. <br> <br> If the line is too thin, the vehicle may stray off the line, please make the line thicker ( the line should be a quarter inch thickness )<br> <br>  Feature: <br> This is a novelty inductive tank, follows the line like magic. <br> <br> If you place the Inductive Tank Toy somewhere else it would run in circles only until it finds the line. <br> <br> The Children's Tank Toy has an optical sensor that reads the black line drawn on a white piece of paper. <br> <br> The tank powered by 4 x AG 13 button cell.<br> <br> Turn on the power switch and the Magic Tank Toy can move atomatically.<br> <br> The line: not under 4mm, not overrun 10mm, non sharp-angled line. <br> <br> Perfect gift for your little child.<br> <br>  Package: <br> 1 x  tank or car<br> <br> 1 x Magic pen<br> <br> 1 x Instruction manual <br> <br> 1 x White paper with black lines