Atomic Bomb 
To dream of an explosion represents the liberation of negative and destructive feelings that were once hidden deep in the psyche. This eruption can become dangerous if no other proposed solution has proved to be successful. Seeing the explosion of an atomic bomb and its threat of radioactivity can be an indication of a sickness brought on by refusing to deal with these emotions of rage and ire.
High School
High school represents a turning point in life. It is a time when one meets lifetime friends, commits silly mistakes, and shared hopes and dreams. A mixture of emotions, expectations, and memories gushes out from the thought of high school.
To dream about high school refers to lessons learned and preparations made for life.
Dreaming of high school likewise brings to mind your parents' expectations from you. To fail high school indicates doubt in your abilities or accomplishments in your life, based on previous failure or insecurities you had in high school.
Twenty Four
The number twenty-four symbolizes love, happiness, and success. It also indicative of your ties with influential persons in society. You also exhibit an air or arrogance because of your success.
Odd Numbers
To dream of writing or counting odd numbers indicates unfairness in your waking life. A situation may need careful examination as someone could be getting the raw end of the deal. Dealing justly with a situation now will save guilt and or heartache in the future
Santa Claus
Santa Claus in a dream represents comfort and happiness because he may have a strong connection to your father.
Alternatively, Santa Claus may represent Christmas.
A Santa Claus who appears menacing in a dream indicates that you are feeling stressed preparing for a holiday.
To see someone dressed as Santa Claus in a dream applies the characteristics of Santa Claus to them. For example, to see your brother dressed as Santa Claus indicates that you believe he is a kind and generous person.
Kindergarten
To dream of going back to kindergarten indicates a need to reconnect with your inner child.
To dream of being afraid in kindergarten indicates that your inner child may need to be comforted and supported. Memories from your past which have made you feel shy or insecure may be causing you trouble in the present.