A parenting note:

The next time you are really sad, imagine someone you turn to for support ignoring your sadness or telling you that your feelings are silly. How much worse would that make you feel?

That is what we do when we let a child cry without emotionally comforting them. Many parents mistake empathy with giving in. They are wildly different. How?

When your child is crying, sad or angry, to them, what they are crying about (no matter how seemingly insignificant to us) feels important at that moment.
Acknowledging a child's feelings when they express themselves is key - and does not mean you are giving in.
It simply encourages them to label and understand their feelings in the future. Saying "I'm sorry you are so sad" or "You are really upset because you wanted the orange cup and not the red one" is validating how they feel and essential to their gaining a sense of security and protection.

You don't have to give them the red cup, you do just as much by acknowledging that they wanted it and that they are sad about it and offering
a hug.

Teaching emotional intelligence starts in the baby years and never stops.