Answer:
Forward I’m heavy, but backwards I’m not.
Feed me and I live, give me drink and I die.
During the 1800's these turned women into hourglasses and is becoming more popular again these days
I drift forever with the current down these long canals they’ve made, Tame, yet wild, I run elusive Multitasking to your aid. Before I came, the world was darker, colder, sometimes, rougher, true. But though I might make living easy, I’m good at killing people too.
Long and slinky like a trout, never sings till it's guts come out.
You use it between your head and your toes, the more it works the thinner it grows.
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?