Being cool is when you're popular and people like to be around you. But sometimes, some people think that being cool means being mean or teasing others. That's not really cool, though. What's really cool is being kind to others. That means being nice even when you don't have to be. Kindness can make people feel good, and it can make you feel good too.
Think of it this way: when you share your toys with a friend or help someone who's having a hard time, you're being kind. It's like giving them a gift that doesn't cost anything - the gift of a smile or a feeling of happiness. And when you make someone feel happy, they might want to be your friend and spend more time with you.
So, it's important to remember that the coolest thing you can do is to be kind to everyone, even if they are different from you or if you don't know them well. Being kind makes the world a better place, and it makes you a better person too.