Haven't changed this text since Oct 2004. Is it three years already?
Just had a clear up of some ideas as well.
The best from my 3 years of sweat and tears, and worn out finger-tips? I like the self bouncing ball, village clock and the waffle meter, all of which I would like to see working in real (non-hb) life.
Other ideas that I have liked, for some reason or another, in no particular order:
Fresh water hand pump, by [Worldgineer]
Coffee cup watermark, by [AO]
Wordy watch, by [phundug]
Knowing when it's half full or empty, by [FarmerJohn]
We apologise for the inconvenience..., by [froglet]
Reverse RFID tag, by [hippo]
Ring Clock, by [fridge duck]
Cheap Shot Recreation, by [half]
Photospotting, by [Detly]
Beer Miles, by [Checkers]
A Push-Brite Wall, by [Zuzu]
Strobeverts, by [gtoal]
Raster pen, by [gtoal] again
Mirrored Mosaic Madness, by [lostdog]
http://www.halfbakery.com/idea/Mirrored_20Mosaic_20Madness (brilliant, I think!)
inflaTUBE, by [arvin]
Oh, and I almost forgot Water Maze, by Simonj (sorry!)
I apologise if there are some that you think ought to be here, and are not.