Answer:
my rings are not worth much but they do tell my age.
I come with a train and go with a train and the train doesn't need me but can't go without me.
By myself, I'm practically nothing. Worthless as a leader, but when I follow a group, their strength increases tenfold. What am I?
I may be made of metal, bone, or wood and have many teeth. My bite hurts no one and the ladies love me. What am I?
If two's company and three's a crowd what are four and five?
Give it food and it will live, give it water and it will die.
What am I?
Animal
Difficult
Easy
Food
Funny
Kids
Logic