We have a trope called Parent Service - which is about Fanservice in family films specifically for the parents who'd be taking their kids to see them. Have you seen other 90s Disney films? Ariel, Jasmine and Pocahontas were incredibly sexualised.Some children know what boobs are as well, so they'd probably just take that as an innocent joke. Most children would probably just assume that all Sarah would want to do is kiss at most. Well, most of the sexual references will go right over a child's head."WHOOOAA!! SPEED BUMP!!" ( The Nostalgia Chick makes the funniest shocked face ever).In fact, he loves them." -shrug- It doesn't seem completely Disney to me, but then again, there are those YouTube subliminal messages. Why did Disney allow so much fetish material in this movie? Sarah's obvious boob window on the front of her dress (and her obsession with 'playing with' every male character in the movie)? In the scene where Max is humiliated by little Dani's statements, one being, "Max really likes your yabos.This also explains why Dani, Max and Allison don't fall for Sarah's song. They gave candy crows to children so there's a deleted scene (missing from anything but 1990s video cassettes of the movie) where the witches go to a store to get items including a BBQ. There's a dropped subplot where the witches were candy makers.Regarding the ingredients, an unspecified amount of time passed between the Sandersons abducting Dani and them preparing to give her the potion, so it's possible they spent that time collecting the ingredients once they had the book back raiding a morgue for the dead man's toe, break into a market for the herbs, etc.As for Binx not destroying the candle, considering the rules of the time, it seems likely he was a virgin himself, which would limit his available methods of destroying the candle without risking triggering the curse, so he probably decided it was easier to leave the candle in one place where he could keep an eye on it.Maybe the sisters cast spells on their other ingredients so they wouldn't decay? A dead man's toe isn't something you can stock for a long time normally, what with how quickly flesh decays.
The book at least was enchanted so that it couldn't be burned or destroyed (and therefore wouldn't decay).