Follow Any Drawing Line Pen To Sense Dog Model Children's Toy Gift 5ML Features: A variety of super modes. A versatile puppy can sing,, walk, follow the owner's route, and be an obedient dog. FOR KIDS: Kids will be amazed at how the dog follows the line automatically and have great Just like magic! INDUCTIVE DOG: Optical sensor inside follow black lines drawn by any pen, limited to the pen came with the package. The dog will turn in if placed elsewhere until it finds a black line to follow. CREATIVITY: Pre school kids or learning children can use their and to plan routes for the truck to follow. USEFUL TIP: Line thickness should be within 4mm to 1mm. at a quarter inch (6mm). Packing specification: 16 x 7.4 x 18.6 cm/6.3x2.9x7.3in How to play: Use an marker to draw a line on a white piece of paper Turn on on the button of the dog Place dog of the drawn line The dog will run on the line automatically If the line is too thin, the dog may stray off the line, make the line thicker (The line should be a quarter inch in thickness ) Package Include: 1 x pen 1 x Inductive Dog 2x Colour paper