Instructable user Ugifer put together this DIY project for a solar garden lamp for a science experiment that he was doing with his daughter and her friends and he's given us permission to share it with you all. The skills and lessons taught would make it great for parents and educators to share with kids as an introduction to green tech, but it would also be a great beginner level project for those just getting into making their own electronics.
Ugifer says, "It's simple and fairly quick to do so although it does involve some soldering I don't expect that we will have trouble doing this with our small group of carefully supervised 7-year-olds.
The idea for this project was inspired by this article over at Evil Mad Scientist although the circuit is modified to be a little more efficient. Because it's made up from a simple set of parts it would make an ideal beginner's electronics kit.
This is a nice, sustainable-energy kit, with all the power for the lamp being sourced from renewable solar energy. It uses scavenged jam-jars as the enclosure but could also use some scavenged parts such as toroids from old CFLs."