Answer:
Precious stones in a pack of cards.
What is often on the ground getting stepped on by others, but you donโt have to wash it because it never get dirty, in fact you couldnโt wash it even if you tried?
What never gets any wetter no matter how hard it rains?
I'm the source of all emotion, but I'm caged in a white prison.
The more you look at it, The less you see.
What is big and yellow and comes in the morning, to brighten mom's day?