then why would you bother to learn what kind it is? Oklahoma has rattlesnakes, copperheads, and cottonmouths for venomous. every other snake in OK is harmless.
more people get bitten while trying to kill or catch the snake than by accidentally stepping on it, so you would be better served teaching your child to avoid snakes or at least learn which ones are dangerous.
^^ AKA Water Moccasin for those that don't know.