After reading so many reviews and movie reviews, haven't you noticed?
The ghosts Simon started seeing were not the orphanage ghosts, because his "friends" were named "Watson" and "Pepe", while the "'Thomas" friends in the cave were the ones he saw in Thomas' cabin name,
So personally I prefer the movie to express the theory of no ghosts, and some of the details that cannot be explained are to create effects (the treasure hunt game was designed by Simon. From the beginning, my mother asked if the sand was down by him, and he snickered. It can be seen that Simon is also very smart. ),
What the movie wants to express is to let parents and children play together and communicate more (Simon imagines that there are children, which may be because parents play less with him)
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