It just so happened that while I was at the #gafesummit this weekend, I was introduced to paper circuits. Here's what I was able to make:
We used LED light stickers which were really cool, and I'm pretty sure that everything was supplied by Chibitronics. I am also going to be showing this to a grade 4 teacher who is talking about electrical flow as it's a fun activity for kids, and it teaches them hands on activities to make. Chibitronics also has a number of templates that you can use if students are unable to design their own circuits. Very cool stuff.