The mouse is a tool to help u search what u need to unless u have the touch screen one like me which... i dnt rlly need a mouse.. 0_0 anywaysss a mouse helps u scroll and its easier and helps for u to get the research ur looking for...I would want a mouse bc they are fun to play with wen u click thm over and over again and wen it lights up underneath XD green or red ^~^