Monday's Riddle: A Tweak on Hide and Seek...

Hello, Riddlers! Can you guess our theme? Many interesting things end up in this pile at school. ; ) ~ F

You've checked your pockets, turned the bed, searched the places in your head. Where it is, you don't know, but you can see it so. Like a game of hide and seek with two words you must tweak. If it's this, and then you find, you'll know the answer I've in mind.

What am I referring to? Stop by Wednesday for the answer.

I gave you a clue!

FEAR NOT THE UNEXPECTED