Answer:
I shift around though always slowly. I never move more than a few inches at a time. A large movement by me can kill many people. I am huge yet unseen by humans.
I have a head, tail, but no arms and legs. What am I?
I spend most of my day eating white. When I am quick enough I get rewarded with fruit and something blue. In a dark room with blue walls I run from the ghosts that roam the halls
I am a mini solar powered computer
What do people spend a lot of money on every year, but never want to use?
Those with eyes bigger than their stomach will definitely leave the restaurant with one of them. It is named after a house pet as well.