Answer:
Add a T and I shoot through the sky. Then add an S and I multiply. What word is it?
Large as a mountain, small as a pea, Endlessly swimming in a water-less sea.
I do not breathe, but I run and jump. I do not eat, but I swim and stretch. I do not drink, but I sleep and stand. I do not think, but I grow and play. I do not see, but you see me everyday.
My love, when I gaze on thy beautiful face. Careering along, yet always in place, the thought has often come into my mind. If I ever shall see thy glorious behind.
It floats over the land, It cuts the tallest mountain, Its voice is like a fountain, Its body like a snake, Will flow into a lake.
What goes up the hill and down the hill, And spite of all, yet stand still?
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?