Answer:
A shimmering field that reaches far. Yet it has no tracks, And is crossed without paths.
I saw a strange creature. Long, hard, and straight, thrusting into a round, dark opening. Preparing to discharge its load of lives. Puffing and squealing noises accompanied it, then a final screech as it slowed and stopped.
Jack and Jill when up the hill jack fell down
Hard to catch, easy to hold. Can't be seen, unless it's cold.
What runs around all day. Then lies under the bed. With its tongue hanging out?
What is so fragile that saying its name breaks it?
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?