Once Upon a time there was a mouse as white as snow, as fast as the wind, as quiet as the night. It was only 11 cm tall and 6 cm wide. It was a very clever mouse, it worked really hard and was reliable every time. Trough a few commands it makes a huge work. It wasn't like a normal mouse. Because it never slept, it was alway ready and it only needed batteries to eat. Stop! Batteries? Wich mouse needs batteries to eat? Yes, there's one! Do you know which one?