Put yourself in grade school again. You're in the schoolyard when another child bumps you from behind. You fall into a puddle. Was the bump intentional? How do you react? Or: you overhear a friend ...

Babies bite. Toddlers throw tantrums. Kids play rough. Siblings might swat at each other while fighting over toys or the last popsicle. It's not uncommon for children — especially younger ones who ...

When a prickly comment comes wrapped in a smile, it's a bit harder to uncover Passive-aggressive behavior can make friendship confusing. One second, you’re clinking glasses of espresso martinis over ...