In a peaceful stream, Otter loved to play. Splashing and diving, she spent her day.

One morning, she found a note by her den. It read, 'Meet me by the big rock at ten.'

Curious Otter swam to the spot. There, a Giant Serpent in the water was caught.

Serpent hissed, 'Let's play a little game. Solve my riddles, or trapped you shall remain.'

First riddle asked, 'What has keys but can't unlock doors?' Otter thought hard on the shores.

'A piano!' Otter exclaimed with glee. 'You are smart,' the Serpent agreed.

'What comes down but never goes up?' the Serpent questioned, sneaky and abrupt.

Otter pondered, gazing at the cloudy sky. 'Rain!' she shouted, delighted by her reply.

'Last riddle,' Serpent said, 'Listen well. I'm full of holes but hold water. Can you tell?'

Otter paused, this was tough. But then she smiled, 'A sponge! I've played enough.'

Serpent grinned, his challenge done. 'You're clever and wise; the game is won.'

With respect and friendship newly found, Otter played, Serpent all around.