Once upon a time, in a world powered by gears and gadgets, lived three little robots. Bolt, the eldest, was a sturdy bot with a chrome finish and a practical mind. Rusty, the middle child, was a bit of a tinkerer, always covered in oil and spare parts. And finally, there was Spark, the youngest, with a sleek design and a love for adventure.

One day, their mother called them together. "My little robots, you are grown up now and must build your own houses. Remember, a strong house is a safe house." The three robots hugged their mother goodbye and set off into the wide world.

Bolt, ever the pragmatist, decided to build his house from strong steel bricks. He worked tirelessly, welding and hammering, until he had a sturdy, fortress-like home. "No wolf will ever blow this house down!" he declared proudly.

Rusty, always looking for a shortcut, gathered discarded wooden crates and scrap metal. He quickly assembled a ramshackle house, more interested in getting back to his tinkering than in building a solid structure. "Good enough," he muttered, wiping his oily hands.

Spark, with a twinkle in his LED eyes, envisioned a house of glass and light. He carefully collected discarded solar panels and transparent plastic sheets, creating a beautiful, sun-powered house that shimmered in the sunlight. "This is the future!" he exclaimed.

One day, a sly fox, known for his cunning and love for robot parts, came across Bolt's house. "Little robot, little robot, let me in!" he called. "Not by the hairs on my chinny chin chin!" Bolt replied from inside. The fox huffed and puffed, but the steel house wouldn't budge.

The fox then came to Rusty's house. "Little robot, little robot, let me in!" he snarled. "I'm busy!" Rusty shouted back. The fox grinned and blew with all his might. The flimsy house collapsed with a crash, sending Rusty scrambling for safety.

Finally, the fox reached Spark's gleaming house. "Little robot, little robot, let me in!" he demanded. "Absolutely not!" Spark responded. The fox blew and blew, but the smooth glass deflected his breath. Frustrated, he noticed a ventilation shaft on the roof.

The fox climbed up and squeezed into the shaft. Inside, he found himself in a room filled with mirrors. Confused, he saw foxes everywhere he looked. Panicking, he ran around, bumping into the mirrored walls, until he fell through a trapdoor and landed in a pile of soft cushions.

Spark and his brothers, who had arrived to help, found the fox trapped. "You won't bother us again, will you?" Spark asked. The fox, dizzy and defeated, shook his head. The three robots helped him out and watched as he scurried away, vowing never to bother robots again.

From that day on, the three little robots lived happily in their houses. Bolt continued to value strength, Rusty learned the importance of good construction, and Spark kept innovating. And they all knew, that together, they could overcome any challenge.