Hell and heaven project ideas?

You don't say what you are talking about. The only sort of course where that would be appropriate is theater arts, but that would not be a personal view. In any other field your personal view doesn't matter.

You could a pretty, shining, golden maiden next to a slightly uglier, darker, brooding lady, both sad. Make them simple, if you want.

"Hell and heaven aren't different worlds. They're naught but two sisters, cursed to different fates."

If that idea didn't help, here are some things that have been floating in mind about this for a while (It would be so cool to do a project like this, I've always wanted to, so here's 2 more!);

"A place with angels isn't heaven. A place with devils isn't hell. It's the kind of hearts they have that truly matters."

Maybe an angel with a black heart and a devil with a pure one could be an idea of a sketch? You could just draw the shadow, no face required. Chiaroscuro (black and white) would look nice to me.

"Not heaven nor hell is the true home for a child; life is where they belong."

There could be a picture of a smiling, peaceful sleeping child with an angel watching him/her from the top and a devil watching him/her from the bottom. They can be shadows, or they can just be lights (angel, yellow light, devil, black or red or purple light).

Hope this helped!

Put up two identical images of a person hand crushing stones like this one:

http://www.india-inside-out.com/images/work_IMG_00...

(Note: This image is copyright)

On one draw a balloon abve the head with this message:'This is pure hell. Why am I suffering like this?'

On the other draw aballoon with this:' Halleluja! I am building a temple. This is heaven'

Do two sketches, one of the grim reaper (fairly easy you just have to look online for an idea) and the other of a gate on the clouds (presumably a brass gate) with the sun behind it