Explain this to a 2 year old!

This year Elias really notices all of the Halloween decorations and stuff in all the stores and houses. He has started to become scared of skulls, masks, witches, etc. Part of his fear has to do with the fact that Gus put on a very scary mask one day in Party City that made Elias literally try to jump out of the shopping cart. Now when he sees a skull or something scary he says "mask, mask!". When he started to show fear towards these things I told him that we don't have to be scared. We can just say "In the name of Jesus, I'm not scared". I have said this to him over and over again. I thought it would be a good way for him to learn to call upon the name of the Lord when he is scared. Turns out I am not so sure he understands. Now EVERY TIME he sees something scary he screams out "Jesus! Jesus!". Down the aisles of Walmart and Target I hear "Jesus! Jesus!". Passing Halloween decorations while driving I hear "Jesus! Jesus!". Looking at the Judgment set at the church I hear "Jesus! Jesus!". I am not sure if he is really calling upon the name of the Lord, or if he thinks those things represent Jesus. I think I need to work on clarifying the matter to him. I've had to explain this subject to many people that have heard his exclamations of Jesus as we pass Halloween decorations. It is not easy to explain things to a 2 year old!