Monroe, a curious fourth-grader, loved solving puzzles and mysteries. One day, as he was walking home from school, he noticed something strange - his friend Chris was wearing a pair of shoes that looked exactly like the ones Bob, another classmate, had been wearing that morning.

"Hey, Chris, where did you get those shoes?" Monroe asked, his detective senses tingling.

Chris looked nervous and quickly replied, "Oh, these? I, um, I got them from my mom this morning." But Monroe could tell he was lying.