At that young of an age, I would recommend not worrying about treats just yet. 2 month old, they are at a critical growing stage. They need to eat healthy & nutritious feeders right now. Any disruptions to their feeding schedule may change their eating behavior. Such as some people like to give waxworms as treats, but waxworms are known to get geckos addicted so they may stop eating their regular food. You don't want that happening at that young age, it could stunt their growth if they stop eating properly.
I would keep feeding a good diet until at least 5-6 months old before you start looking into treats.