Jacks (or known in Yiddish as Kugelech) is a playground game for children.
The game originated hundreds of years ago, when the only playthings boys and girls had were materials they found near their homes. They collected small stones and animal bones and learned to use them in a game. They tossed them into the air in a way similar to today's version of the game. An older version of the game used five stone cubes made of clay, wood, ivory, bone, plastic, or other substances. The game is usually played with two people.
Kugelach is the most populer jewish game. You will find kids playing with Kugelach at every jewish school.
You can buy Kugelach right here!