Answer:
In buckles or lace, they help set the pace. The farther you go, the thinner they grow.
What is long and slim, works in light. Has but one eye, and an awful bite?
When liquid splashes me, none seeps through. When I am moved a lot, liquid I spew. When I am hit, color I change. And color, I come in quite a range. What I cover is very complex, and I am very easy to flex.
Where humans breath liquid?
A box without hinges, lock or key, yet golden treasure lies within.
I always have to work with something in my eye. What am I?
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?