Suggestions for classroom Photoshop fun, please!

[Anyanka]

Hi all, I'm new here and will introduce myself properly soon. However, for now I'd like to ask for suggestions for fun educational Photoshop projects - I teach a group of teenage boys with Asperger's and Autism once a week.

What we've done so far:
1. Created a 'label' for themselves, using a photograph, threshold/invert/posterise options, type tool and simple colour fills
2. Photo retouching - taking the scratches out of an old photo, red-eye reduction
3. A ghost photo, using layers/opacity and a horror castle, combining various images of castles, lightning, monsters

They loved the last project particularly.

Any suggestions welcome!

[Anyanka]

Anything at all? Please?