$ 99.991Limited stock. Offer ends 30 January 2019.
MudWatt: Grow a Living Fuel Cell
- The award-winning bio-energy pet!
- Build your very own fuel cell that runs on muddy microbes
- A perfect STEM project for budding scientists and engineers
- Includes: 3 complete MudWatt sets with the free App, plus connecting wire for more in-depth experiments