Answer:
Runs smoother than any rhyme, loves to fall but cannot climb!
This thing runs but cannot walk, sometimes sings but never talks. Lacks arms, has handsอพ lacks a head but has a face.
Scythe of darkness, Shadowโs light. Guiding eye of thirteenth sight.
In buckles or lace, they help set the pace. The farther you go, the thinner they grow.
Different lights do make me strange, thus into different sizes I will change.
I have feet on my head
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?