Answer:
What object has keys that open no locks, space but no room, and you can enter but not go in?
What you become during a workout?
Temporary evidence of where you've been strolling
What smells the most in the kitchen?
If you are unsure how to use one then just ask a flight attendant.
Cycle Cycle Cycle.
Easy
Easy
Animal
Difficult
Food
Funny
Kids
Logic
What am I?