This is perhaps not the most politically correct science fair project, but it definitely gets attention. And although it is more based on presentation than science, most people find it very interesting to learn how an electric chair works. :D
This instructable is quite lengthy, though some parts are optional. You'll probably want to scan each section to find what you're looking for. Have fun and happy building!
Also, please note that I will be linking to Amazon.com for the materials used within this project.
Step 1: First you'll need to find a Barbie with bendable arms and legs.
Don't pay too much, though, as we'll be messing her up quite a bit.
If you'd like, take a mugshot. You can use it in the presentation of the science project. I cut my Barbie's hair and drew circles around her eyes with a pencil, and well as smudging lip gloss around her face. Barbie had a rough night.
I also made an outfit for my Barbie using scrap fabric I had lying around. This is a very simple thing to do that will help your project become more attractive. I've included a quite awful Microsoft paint image to explain it!