Here are some viewing options for a five-year-old girl or boy that are fun, not too scary but good with monster or Halloween themes. There is cartoonish violence, but good laughs, particularly with Tweety Bird turning into a Tweety-Bird-Mr.-Hyde-sort-of-character.
Daffy Duck's Quackbusters, an animated Warner Bros. compilation from 1988. It's a loosely strung-together series of stories featuring Porky Pig, Tweety Bird, Sylvester the Cat and other popular characters.
Warner Bros. Halloween Spook-tacular, which lives up to its title, with over two hours of Halloween-themed stories as in Quackbusters, only longer.
The beauty of the two above titles is that you can watch either in twenty-or-30-minute stretches instead of going for the full time.
Monsters Inc. and Monsters University. Both have plenty of screen time featuring various monsters that admittedly are clever creations.
A good tip for parents - fast-forward (do we even say that about DVDs/Blu-Rays anymore?) through the scary bits if need be.