Chains and Darkness:  We as children are chained in the dark by our parents "good-intentioned" lies and are stuck due to our lack of knowledge.

Silhouettes:  Older kids as well as parents go about there lives knowing the full truth.  We are  oblivious to their reality.  Even if they try to enlighten us to the true reality, we remain in our reality, knowing nothing else.  The shadows represent the lies which make up our reality.

Jailers:  Pretty self-explanatory:  Our parents!

Freedom:  At a certain age when we develop to the point where we can logically reason, we are released from our "prison" just like the prisoners in the Allegory of the Cave.  We find the light of truth and are able to see all the pieces don't fit in the puzzle that is Santa Clause.

New Reality:  Once a child has become "free,"  he or she becomes a part of the enlightened masses.  That child now knows of two separate realities; one reality that is misguided and now my

Point of No Return:  At the point where a child realizes that Santa Clause is a myth, he is unable to return to his previous reality.  Similar to how the freed prisoner was unable to tell his fellow prisoners about the truth, we are unable to share our newfound truth with our youngers peers, siblings, etc.  This is because they will either reject the idea as false or will be unable to comprehend.  They remain blinded while we continue onward with our newfound sight.