marbles

noun

I used to play with marbles when I was a child.

意味（1）

Any of several children's games played with small balls (made of marble or more commonly glass).

Egyptian boys played marbles before the days of Moses.

意味（2）

(figuratively, usually in a limited number of expressions) Sanity.

Grandpa's lost his marbles, but at least he still recognizes us.

意味（3）

Some corners are littered with marbles, off the racing line.