Answer:
Send poorly behaved children to me and let them sit here.
I am an animal and a hair product
You can read me both ways I wear; One way it's a number reversed a snare.
I am perfect with a head perfect without a head; Perfect with a tail perfect without a tail; Perfect with either neither or both.
I am a candy that looks like a shepherdβs staff.
Though not a plant, has leaves. Though not a beast, has spine. Though many wouldn't need this thing, It's more valuable than wine.