Will you help me choose some non-frightening Halloween movies?

You could listen to the Redlettermedia Commentary Track for the original Halloween by John Carpenter.
https://redlettermedia.bandcamp.com/track/halloween-half-in-the-bag-commentary-track

Hocus Pocus
Ghostbusters
It’s The Great Pumpkin, charlie Brown
Scared Shrekless
Monsters And Aliens: Halloween
ET
Casper (The movie)
The Little Girl Who Lived Down The Lane (Just part of it takes place during Halloween, and it is kind of creepy, but not big fright like Chainsaw Massacre)

Hotel Transylvania

Spaced Invaders. There are so many jokes you’ll have to watch it multiple times to find them all. You can get it over the Internet.

Monster House
The Curse of the Were Rabbit (Wallace & Gromit)

Predator

Maybe pick a bona fide horror movie, but that is funny? Like Shaun of the Dead or Black Sheep.

Or make it a TV Halloween episode night with:

These two episodes of Buffy the Vampire Slayer:

Halloween
Fear Itself

And this episode of Community:

Epidemiology

^good idea. Modern Family has some good Halloween episodes.

Mars Attacks!

Murder by Death

Nightmare Before Christmas, hands down.
Edward Scissorhands

Practical Magic. Cute witch movie with Sandra Bullock.

@Here2_4 Good suggestion!

How could I have forgotten one of my all time favorites, Beetlejuice??

Thank you for the ideas. She’s excited!