On a most unusual day, a curious boy named Alex made a rather peculiar discovery. He noticed his parents had something unusually different about them: they had three belly buttons instead of one.

This extraordinary observation startled Alex. He was sure that people did not have three belly buttons. It didn't make sense unless his parents were not people but aliens!

His wild imagination started running wild. He pictured his parents as creatures from Mars, with three belly buttons as an alien feature.

The curious Alex decided to investigate further. He began rummaging through his dad's office, hoping to find any clues about their extraterrestrial origin.

Alex's father was a scientist working on a project which he always called his 'life-changing experiment'. Alex had never understood what his dad's experiment was about.

Now, Alex suspected that maybe his dad's project was actually an undercover mission to integrate the alien race on earth. Maybe, the experiment had gone wrong causing the appearance of the extra belly buttons.

He, therefore, concluded that his duty was to return his parents to their home planet, Mars. He started drawing plans and diagrams for a homemade spaceship, fully dedicated to his mission.

Meanwhile, unbeknownst to Alex, his father realized a minor miscalculation in his experiment. His undertaking had no connection to aliens but was, in fact, an experiment with human DNA structure.

Alex's dad had accidentally altered his and his wife's DNA leading to the appearance of extra belly buttons. Worried, he was determined to correct the error while keeping the incident a secret.

Alex, firm in his mission, spent days and nights on his spaceship project. He gathered every possible item, believing it to help him in his self-delegated mission.

His prototype was starting to resemble a spaceship, albeit a quirky one, made of household items. The neighbors started noticing the enthusiastic boy's peculiar project.

On the other hand, Alex's dad was making progress in rectifying his experiment's consequences. He was working tirelessly, determined to put things back to normal.

Alex's spaceship was nearly complete. Excited, he made plans to lovingly send his parents back to Mars. He was too absorbed in his plan to notice his parents' worry.

Alex's father finally found a solution to reverse the belly button mishap. However, he was taken aback by the sight of a makeshift spaceship in their backyard.

Realizing it was Alex's creation, he had a hunch about Alex's assumptions. Guilt-ridden, he decided to explain everything to Alex and correct his misunderstood intentions.

Alex's father sat him down and explained about his experiment. He admitted his miscalculation and how it led to them having three belly buttons, but nothing related to aliens.

Alex, though initially disappointed that his parents were not aliens, was relieved. He was happy that his family would remain together and not be shipped to Mars.

His father apologized for not explaining his experiment earlier. Alex accepted his apology graciously, his heart swollen with love for his very human parents.

Alex's dad applied the corrective solution which gradually returned their bodies back to normal. They were both relieved to be back to their original forms.

Alex took his dad's confession surprisingly well. He was happy to have helped unravel the mystery and learned a valuable lesson about jumping to conclusions.

The spaceship was not all in vain, though. It became the talk of the town, and the local newspaper even covered Alex's unique creation.

Alex became a local celebrity, his story shared and chuckled at among the residents. His spaceship turned into a local landmark. Alex, the boy with a vivid imagination, was known and loved by all.

Alex's father’s experiment was also eventually published in scientific journals. The accident provided valuable insights, making the entire ordeal a fruitful one, albeit not without its quirks.

Alex's imagination never ceased. His parents were not aliens, but the world was full of other mysteries waiting to be discovered. He knew he was just getting started.

So, the boy who once believed his parents to be Martians, became a local hero. He discovered not aliens, but the strength of love for his family, and an undying curiosity to discover and learn.