You're on assignment for National Geographic. How do you charge electronics while in the field? This is a problem that National Geographic explorers face every day.
YOUR CHALLENGE: Create a wearable or transportable way to generate 1 watt of electricity.
Watch the Introduction video to learn about the Engineering Exploration Challenge, and then watch the Animal-Proofing: Level 1 video to gear up for your assignment. Use the National Geographic Engineering Process to design, build, and test a solution to this Challenge.
You can also check out this video of a Google+ Hangout featuring students and their solutions to this and other challenges. Students discussed their work with National Geographic engineers and explorers.