Magical Microbes MudWatt STEM Kit
This was great, I used this for a Microbiology class project. Had great results. very easy to use. I even got my grandson to do one
This bio-energy pet is a blast of fun and learning! The Magical Microbes MudWatt STEM Kit allows kids to light up an LED and power a clock, using nothing but mud. This excellent 12th birthday gift idea engages children to build their own living fuel cell by feeding the microbes on the soil. MudWatt also allows them to track the growth of their microbe population, and unlock chapters of a comic book included on the free MudWatt Explorer App.