Answer:
I come with a train and go with a train and the train doesn't need me but can't go without me.
I am the second L in LOL.
I am black within and red without; with four corners round about. What am I?
You bind me and I walk. You loosen me and I stop. What am I?
I am the kind of fish that chases a mouse.
It has no top or bottom, but it can hold flesh, bones, and blood all at the same time.
What am I?
Animal
Difficult
Easy
Food
Funny
Kids
Logic