I would do one stocking for all the snakes, get anything you can think of that you might need for the snakes and then get some Christmas decals that your son can place on the outside of the snakes enclosures.

On a side note, it may be time to explain to your child that Santa is not real. I for one would not want my child's Christmas wonder shattered by some cruel kids on the playground. Its better that you explain it to him. Kids can handle a lot more than people give them credit for. I have explained the Santa, and the Tooth Fairy situation to a few of my cousins and as they got older they came to me for the truth about much harder topics, like sex, drugs and issues with parents. I recently spent many nights talking with my 18 year old cousin about how even though his mom cheated on his dad 10 years prior, its not her fault for ruining his childhood and in fact his childhood may have been a lot worse had his parents stayed together. I bring all this up because I feel that something as simple as explaining the truth about Santa to a child makes a life long impression. Its not an opportunity I would want to miss as a parent. I would like to think that I am a good person for my younger cousins to talk to, based on my education, experiences, and honest concern for their well being but having spoken to my aunts and uncles they all wish that their children were coming to them.