It was a bright sunny day in the world of Peppa Pig. Peppa was playing in her lab, mixing different substances to make a new experiment.

Unbeknownst to her, the experiment she was performing was about to get a lot more interesting than she had initially thought.

Suddenly, her room was filled with a strange gas. Peppa inhaled deeply, not knowing what she was doing.

As soon as the gas went in, Peppa's voice started to change. It became high-pitched and squeaky, making her sound a lot like a helium balloon.

Laughing at her new voice, Peppa decided to use this opportunity to have some fun. She grabbed her bike and headed outside.

With her voice still high and squeaky, Peppa started telling a dramatic story about riding her bike and bumping into a mailbox.

The other animals laughed and clapped, thoroughly enjoying the unexpected performance by Peppa.

Suddenly, the helium effect began to wear off. Peppa's voice started to return to normal and she was left feeling a little dizzy.

The other animals looked at each other, confused about what just happened. They wondered if they had just imagined the whole thing.

But then they noticed that all the helium balloons they had brought for George's birthday party were now empty.

They all looked at Peppa, who was now back to normal, except for a slightly guilty expression on her face.

"Peppa," said Mummy Pig, "did you inhale all the helium from the balloons?"

Peppa nodded slowly, her cheeks turning as red as her dress. "I didn't mean to, Mummy," she said, looking down.

"Well, Peppa, it's okay," said Mummy Pig, "But you have to understand that inhaling helium can be dangerous."

Peppa nodded, her ears dropping slightly. "I understand, Mummy. I won't do it again," she promised.

Every critter in the neighbourhood learnt a valuable lesson that day, even Peppa.

They realized that sometimes, things that seem fun can also be dangerous, and it's wise to be careful.

But they also learned that no one is perfect, not even Peppa, and that it's okay to make mistakes as long as we learn from them.

Everyone agreed to keep an eye out for more helium shenanigans in the future, especially during party preparations.

And with the helium incident behind them, they continued with George's birthday party, making sure all the balloons were filled with air, not helium.

Mummy Pig made sure to remind everyone about the important lesson they had learned. "Remember, safety first, fun second," she said with a smile.

Peppa agreed, promising to be more careful with her experiments in the future. "Yes, Mummy. Safety first, fun second," she echoed.

And so, the day ended on a happy note for everyone. The sun set, casting a warm glow over the town, as the animals prepared to sleep.

Peppa went to bed, promising herself to be more responsible in the future and always to remember the day of the helium hijinks.

Because what matters most is not the mishaps along the way but the lessons we learn from them. And Peppa Pig, like all of us, is always learning.