Once upon a time, there were four friends named Alex, Lily, Max, and Emma. They were all science enthusiasts and loved to experiment with different things. One day, they were working on a project together and accidentally invented a time machine! They were so excited and couldn't wait to try it out.

The four friends decided to travel back in time to different historical eras. First, they went to the time of the dinosaurs. They were amazed by the giant creatures and even got to ride on a triceratops! But they also learned that it's important to be careful and respectful of the past.

Next, they traveled to the time of ancient Egypt. They got to see the pyramids being built and even met Cleopatra! They learned about the importance of hard work and perseverance from the ancient Egyptians.

Then, they went to the time of the medieval knights. They had to be brave and clever to survive in this dangerous time. They also learned about the value of friendship and teamwork.

Finally, they traveled to the future and saw all the amazing advancements in technology. They realized that their time machine was just the beginning and that they could invent even more incredible things in the future.

The four friends had the time of their lives traveling through different eras and learning valuable lessons along the way. They couldn't wait to see what other adventures and discoveries awaited them in the future. The end.