Zurich, 1884. You are Marcel, a curious 6-year-old spending your summer near St. Peter’s Church. But today, the clock has stopped, thunder rumbles in the distance, and a strange man with kind eyes and a violin asks for your help. 

You guide him through the city’s cobblestone streets, unaware that he’s Albert Einstein—long before he’ll change the world. As you walk, he teaches you to question time itself, solve mind-bending puzzles, and see the universe in a new light. 

This walking adventure is a story of wonder, science, and connection—perfect for families and curious minds. But beware: by the end, you might discover that the greatest mystery… is you.