Ok so I realized yesterday after watching House of Wax for maybe the 30th time, after literal years of loving this movie, that the wax museum might in itself be a sort of larger replica or representation of the Sinclair house.
I can’t find any pictures of the Sinclair house but in my vague memory I think it looks a little bit like the wax museum? The inside is of course a lot larger but it might share at least a few similarities. But my strongest evidence is that inside the museum the wax figures aren’t set up randomly or on specific displays, they are clearly set up in an all encompassing scene: a party or gathering of some sort. They are dressed nicely, some are dancing, others seated, Wade was placed as a performing pianist, there is a table set up with a feast etc. This is clearly some sort of house party.
And upstairs, in what looks to be a master bedroom, is a crib with two conjoined twins, clearly a sculpture of the Sinclair twins before they were separated (or an imagined version where they never were separated). The downstairs is clearly one consistent scene, so what’s saying that the upstairs isn’t part of that scene? Maybe the wax sculptures are all part of a much larger artwork, that depicts or is at least inspired by a house party at the Sinclair house.
Other parts of the town are like this, like the church and the cinema, the individual statues aren’t the main focus, they are all parts of a larger picture. It’s fair to assume that the other buildings in town are either also set up as scenes (like the peeking old lady), or are planned to be like that. But since the Sinclairs still have to live somewhere, they can’t set up a scene of their family going about their life in their own house. So perhaps the museum is a replacement of the Sinclair house in the larger art piece that is a completely waxified Ambrose.
Maybe when the museum was first built it wasn’t intended to be that way, which is why it isn’t a perfect 1:1 of the Sinclair house. But maybe Trudy (or Vincent, or maybe even Bo) decided later on to turn it into a waxen copy of their home, with a scene set of a dinner party, with the Sinclair twins in their crib upstairs. Which could also explain the highchairs: if the scene is supposed to be of a party at the Sinclair house, it makes sense that they would push the twins’ highchairs out of the way of the guests, but they would still be there because the twins would use them. Why would they be there if it’s a completely unrelated, made up scene? Although I’m not sure how they would use two separate chairs if the twins are still conjoined.
This isn’t a perfect theory but it hit me like yesterday that this might be intentional. I assume everyone else has realized this long ago but it was fun ranting about it:)