"I Spy" is a popular children's game that involves players taking turns to choose an object in their surroundings and give a clue about it. The clue usually starts with the phrase "I spy with my little eye, something that is..." followed by a color or a characteristic of the object. Other players then guess what the object is based on the clue provided. The game encourages observation and critical thinking skills, as players must pay attention to their environment and think creatively about the clues. "I Spy" can be played anywhere, making it a versatile activity for families and friends, whether at home, in the park, or during travel.