Answer:
I help engines spin and pants stay up
My second is performed by my first. A thief by the marks of my whole might be caught. What am I?
What is so delicate that saying its name breaks it?
What comes once in a year twice in a week but never in a day?
I am not very commonly found! Only in some rainforest! I have an odd number of toes! I'm very lazy and hang upside down!
No matter how little or how much you use me, you change me every month.
What am I?
Animal
Difficult
Easy
Food
Funny
Kids
Logic