Apologies if this has already been asked but I haven't read the book so I'm unsure of something that happens in It: Chapter Two.
We learn that The Losers Club has to perform a ritual to destroy the entity It, and Mike tells them they have to:
find items from their summer to sacrifice to the ritual
Bill then comes across a storm drain and hears Georgie again.
he is then pulled in and when he manages to free himself he is holding the S. S. Georgie, presumably taken from It.
My question is, if It knew what the Losers were up to, why would he willingly allow Bill to have the item back?