This is a very simple lab that requires only a few materials and very little prep. This lab was created to use with high school Physical Science students to introduce (and refresh their memories of what they've learned in previous grades) circuits. It is a pretty basic lab and I would imagine would be easily adapted to any grade level teaching circuits.
You'll need wires with alligator clips at both ends (6 per group), small circuit light bulbs with holders (3 per group) and a D battery with holder. Of course, you can always improvise where you see fit.
Other labs to check out:
Balloon Rocket Lab for Newton's Laws