During a recent visit to see my newborn niece, I spent much of the day playing with her big brother and sister. Of course, the three of us had a great time at the park, riding bikes, eating lunch at a local cafe, reading books and playing with a few inexpensive toys that I brought for them, including horns for their bicycles. After the little ones squeeked those new horns (for what seemed like 100 times each) big brother decided to hold his over his ear and squeek it some more. And, when little sister saw what he was doing, she joined right in. My initial reaction was to stop them and briefly explain why that wasn't a good idea; however, after only a few direct squeeks to the ears, they stopped -- no explanation necessary.