Aaradhya was a curious fourth-grader who loved solving mysteries. One day, as she was unpacking her bag for lunch, she realized her favorite lunchbox was missing. She scanned the classroom, but it was nowhere to be seen.

"Who could have taken my lunchbox?" Aaradhya wondered, her brow furrowed in deep thought. She knew she had brought it to school that morning, so it had to be somewhere in the classroom.

Determined to get to the bottom of this mystery, Aaradhya started to investigate. She carefully examined her desk, looking for any clues that might lead her to the missing lunchbox. Suddenly, she noticed a small piece of paper tucked under her notebook.

"Aha!" Aaradhya exclaimed, pulling out the note. It read, "I have your lunchbox. Meet me at the big oak tree after school if you want it back."