What do you mean by people with certain inclinations?

Yes, it's possible to make fog with dry ice, but it's not very practical. You need to keep adding the dry ice to some sort of bowl with hot water. It's also dangerous, you can burn yourself by touching it and as it melts it turns into a kind of toxic gas that can lead to asphyxiation. If we do it in the square, it should be an open enough space, but we will need lots of dry ice and hot water. Again, not ideal.

There might be, but if they're too expensive, we might not be able to afford them.