The answer is Kendama.

This is a name both for Japanese traditional playing and for the tool itself.

A Kendama is made of wood.

Word for word, it is made of a stick and a ball.

Children played it when they had free time.

Long ago, mother did housework and a father meant out to earn money, so children played together in their neighborhood.

On sunny days, children could play outside.

But on rainy days, children had to play alone inside, so Kendama be came popular.

Kendama has a corn on top, three cups on both sides and the bottom and one ball.

It is easy how to play.

You grip the middle of the stick and put the ball on a cup or a corn.

Then, you must not use the other hand.

You must use your wrist and knees effectively.

There are various tricks, so it’s getting more and more difficult as you master the tricks.

Even now, it has a lot of fans and they hold a lot of tournaments.