Answer:
What bird can lift the heaviest weight?
If you drop me I'm sure to crack. But give me a smile and I'll always smile back.
Bold are the first; true are the second; playful are the third; clever are the fourth; forceful are the fifth.
I'm the source of all emotion, but I'm caged in a white prison.
What can answer in any language? What can speak without a mouth? What can sing without an ear?
You use it between your head and your toes, the more it works the thinner it grows.
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?