What are you doing grandma?

Leo and Diana sat at the kitchen table, groaning over their math homework. "I hate fractions," mumbled Leo, chewing on his pencil. Diana nodded in agreement, pushing her workbook away dramatically. Grandma rocked gently in her chair by the window, her crochet needles clicking rhythmically. "I'm doing math too," she said with a mysterious smile.

"What, this is math?" Leo pointed at Grandma's colorful yarn creation. Diana leaned forward curiously, examining the intricate pattern forming in Grandma's hands. "Come with me, I'll show you!" Grandma set aside her crocheting and stood up. The cozy living room with its ship models and seashell collections suddenly seemed to shimmer around them.

Before the children could blink, the walls melted away to reveal wooden planks of a ship's deck. The gentle rocking of the living room chair transformed into the swaying of a vessel on open water. "There's math everywhere under the water," said Grandma, helping them into diving suits. Leo and Diana exchanged excited glances as they zipped up their unexpected adventure gear.

Soon only their heads remained above the sparkling blue water. "We're in the sea, Grandma! Where is the math?" called Diana, adjusting her mask. Leo paddled nervously beside her, looking for numbers floating in the waves. "Trust me," Grandma replied with a knowing wink. They took deep breaths and slipped beneath the surface.

Their flippered feet kicked rhythmically as they descended into the underwater world. Small silver fish darted around them, forming perfect schools of identical shapes. One curious fish paused, seeming to wonder what these strange creatures knew about mathematics. Leo pointed excitedly as patterns began emerging all around them.

The children floated among vibrant coral formations, their eyes wide with wonder. Diana traced the perfect spiral of a nautilus shell with her finger. Leo counted the symmetrical arms of a starfish, realizing each was precisely the same length. Grandma nodded encouragingly as the children began to notice the mathematical perfection surrounding them.

A red crab scuttled across the sandy bottom, leaving perfectly parallel tracks in its wake. "See how straight those lines are?" Grandma's voice somehow reached them underwater. "That's Euclidean geometry - the math of flat surfaces and straight lines." The children watched in fascination as the crab demonstrated perfect parallel lines without any measuring tools.

A pufferfish expanded suddenly, transforming from an oval into a perfect sphere. Tiny bubbles rose around it in perfectly circular patterns. "That's spherical geometry," explained Grandma, tracing a circle in the water. "On a sphere, the rules of math change - like on our round Earth."

They swam toward a magnificent coral formation with ruffled edges that curved and folded upon themselves. "This shows hyperbolic geometry," Grandma explained, pointing to the increasing curves. Diana ran her hand along the undulating surface, feeling how it created more space within its folds. Leo noticed how the pattern repeated yet changed slightly with each iteration.

As they slowly ascended toward the surface, the children pointed excitedly at everything they passed. "The angle of that fish's tail!" exclaimed Diana. "The hexagons in that honeycomb coral!" Leo added. "Math is everywhere!" they shouted together, bubbles escaping from their masks.

Dripping wet on the ship's deck, Grandma picked up her crocheting that had somehow appeared beside her. "Do you see now that this is math?" she asked, showing them the pattern. Leo traced the repeating loops while Diana counted the stitches. "You're creating geometry!" Diana realized with wide eyes.

Suddenly, they were back in their cozy living room, completely dry. The ship models and seashells seemed to wink at them from the shelves. "Now, about that homework," Grandma said gently, returning to her rocking chair. Leo and Diana rushed back to the table, seeing their math problems with new, excited eyes.