Answer:
*forward* *backwards*is what I do all day. I come in all different shapes and sizes. I can be scary and I can calm you down.
I am not alive but I grow I don't have lungs but I need air I don't have a mouth but water kills me. What am I?
I have a hundred legs but cannot stand a long neck but no head and I eat the maid's life. What am I?
I am needed for most animals and hardcover books
I am often sold by children entrepreneurs in summer time
I flow from the Homerβs mouth when he sees doughnuts.