Self-Worth is what we think and feel and believe about ourselves. Low self-esteem means you don't feel very good about yourself.
Kids with self-esteem:
Feel proud of what they can do.
See the good things about themselves.
Believe in themselves, even when they don't do well at first.
Feel liked and accepted.
Accept themselves, even when they make mistakes.
Kids with low self-esteem:
Don't think they are as good as others.
Don't feel liked or accepted.
Think more about the times they fail, than the times they do well.
Don't notice the good things about themselves.
Are hard on themselves and give up easily.