I just build a Solar Air Collector that helps heating my fish room. On a clear winter morning here in New Zealand he produces 569 watts of free energy in form of warm air! Pretty happy with it to be fair :)
Read more under the "Fishroom" section!
Various Magenta Red Guppies:
Another strain I'm working on - Asia Blue Panda Guppy:
A new strain I'm working on at the moment - Magenta Moscow Guppies.