You're doing daycare or school drop-off, you're already late for work, and your child's lip starts to quiver. A tremble turns into a wail, a wail into heart-rending cries as they clutch at your leg.

If drop-off is either too long or too short, children can experience overwhelming emotions. So try not to drop and go abruptly if you can avoid it. Always let your child know when you are leaving ...