Answer:
What do you get when you cross a cow with a trampoline?
Teenage girls are pros at creating me. Learn me in classes.
I run through hills. I veer around mountains. I leap over rivers. And crawl through the forests. Step out your door to find me.
The shorter I am the bigger I am.
I am a certain five-letter word and become shorter when you add two letters to me. What am I?
The warmer I am the fresher I am.