Answer:
In buckles or lace, I help set the pace. The farther you go, the thinner I grow. What am I?
Soft and cuddly I'll pull on your heart. But take my last name and I'll tear you apart.
I look like a tiny trombone
Use me if you really want to see inside someone
I am ten little beans your look at everyday.
I run through hills. I veer around mountains. I leap over rivers. And crawl through the forests. Step out your door to find me.