This information is provided by the American Academy of Pediatrics.  For the complete first aid guide, click here.

Take your child to an emergency department if you are unsure of the type of snake or if you are concerned that the snake may be poisonous. Do not apply ice. Loosely splint the injured area and keep it at rest, positioned at or slightly below the level of the heart. Identify the snake, if you can do so safely. if you are not able to identify the snake but are able to kill it safely, take it with you to the emergency department for identification.

Important note: The information contained here should not be used as a substitute for the medical care and advice of your pediatrician. There may be variations in treatment that your pediatrician may recommend based on individual facts and circumstances.

Source First Aid (Copyright © 2011 American Academy of Pediatrics)