I'd like to see a child beat Mirror Mode All Cup Tour in Mario Kart.
Yeah... that was a son of a bitch for me to beat. Would constantly get bad luck, such as being hit by stuff repeatedly when I'm in first, only to put me into last. But I had also hit luck, such as being in 5th and taking the first 4 people out 5 feet behind the finish line with a blue shell. Fun stuff.