Trace Truck Inductive Toy

How to play:
Use an ordinary dark-colored crayon or marker to draw a line on a white piece of paper.
Turn on the switch on the button of the car.
Place the car on top of the drawn line.
The car will run on the line automatically.
If the line finished, the vehicle will continue in the direction followed from the previous line.
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).

Feature:
This is a novel inductive tank; it follows the line like magic.
If you place the inductive tank toy somewhere else, it would run in circles only until it finds the line.
The Trace Truck Inductive Toy has an optical sensor that reads the black line drawn on a white piece of paper.
The tank is powered by 4 x AG 13 button cells. (NOT INCLUDE)
Turn on the power switch, and the Magic Tank Toy can move automatically.
Marker pen included.
The line: not under 4 mm, not over 10 mm, and a non-sharp-angled line.
Perfect gift for your little child.