Lose One’s __; Go Insane Over Mislaid Glass Balls
Puzzle 12 of Things We Lose Piece of Cake Pack
Question is: Lose One’s __; Go Insane Over Mislaid Glass Balls
and the answer is: MARBLES
Word Meaning:
MARBLES — Any of several children's games played with small balls (made of marble or more commonly glass).
Definitions from Wiktionary.