He is exactly in the state of 'A frog in a well does not know the vast ocean.'

He was swimming freely as if he was a fish playing in the pot.

Looking up at the Big Dipper, I feel at peace.

I'm going shopping because I'm out of soy sauce.

Octans is one of the constellations in the southern hemisphere.

He felt cognitive dissonance between his actions and beliefs.

He admits that he is bad at athletics.

He was playing alone in the park.

This model of the cubohemioctahedron is very beautiful, isn't it?

This shape is called a gyrobifastigium.