I like to design and construct illuminated water features. I call them 'Lumifonts'.
The idea is to create magical visual effects with flowing water and light. I use some clever technology but conceal it behind natural-looking designs.
In particular I experimented a lot with the 'chromostrobic' lighting technique developed by kinetic light sculptor and friend Paul Friedlander.
Around 2004, I ran a cottage craft start-up company 'Orrelwood Waterworks' aiming to sell Lumifonts. This was artistically successful - I made several beautiful objets d'art, but sadly it was financially inglorious.
Nowadays I just make them occasionally for my own amusement.
Lumifont water plume