Answer:
I am a mini solar powered computer.
I am a mountain at night meadow at day
Little Nancy Etticote in a white petticoat. With a red nose; the longer she stands the shorter she grows.
I start with T end with T and within me is T.
I am three simple words everyone wants to hear. Three simple words such simple words and yet...life changing...
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.