Construible rides (Infento, 2015): a vehicle kit that provides all necessary materials and instructions to build from the ground up, and as a bonus, can be entirely constructed with a single hex key.
Infento: World's First Real Constructible Rides by Infento Rides — Kickstarter
Figure 5. Melting points of metals and alloys.
Utedo | Hjemmelagd utedo
▶ Replace your car battery with capacitors! 12V BoostPack Update - YouTube
100 Kw Pelton Water Wheel: Possible free energy device
Silent rooftop wind turbines could generate half of a household's energy needs, adding solar panels as well could take the home off the power grid.
Pedal powered water pump. 2007.
Water Wheel Generator
Floating barrel generates hydro power in most any stream or river