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]
http://www.halfbakery.com/idea/Fresh_20Water_20Hand_20Pump

Coffee cup watermark, by [AO]
http://www.halfbakery.com/idea/Coffee_20Cup_20Watermark

Wordy watch, by [phundug]
http://www.halfbakery.com/idea/Wordy_20Watch

Knowing when it's half full or empty, by [FarmerJohn]
http://www.halfbakery.com/idea/Knowing_20when_20it_92s_20half_20full_20or_20empty

We apologise for the inconvenience..., by [froglet]
http://www.halfbakery.com/idea/We_20apologise_20for_20the_20inconvenience_2e_2e_2e

Reverse RFID tag, by [hippo]
http://www.halfbakery.com/idea/Reverse_20RFID_20tag

Ring Clock, by [fridge duck]
http://www.halfbakery.com/idea/Ring_20Clock

Cheap Shot Recreation, by [half]
http://www.halfbakery.com/idea/Cheap_20Shot_20Recreation

Photospotting, by [Detly]
http://www.halfbakery.com/idea/Photospotting

Beer Miles, by [Checkers]
http://www.halfbakery.com/idea/Beer_20Miles

A Push-Brite Wall, by [Zuzu]
http://www.halfbakery.com/idea/A_20Push-Brite_20Wall

Strobeverts, by [gtoal]
http://www.halfbakery.com/idea/Strobeverts

Raster pen, by [gtoal] again
http://www.halfbakery.com/idea/Raster_20pen

Mirrored Mosaic Madness, by [lostdog]
http://www.halfbakery.com/idea/Mirrored_20Mosaic_20Madness (brilliant, I think!)

inflaTUBE, by [arvin]
http://www.halfbakery.com/idea/inflaTUBE

Oh, and I almost forgot Water Maze, by Simonj (sorry!)
http://www.halfbakery.com/idea/Watermaze

I apologise if there are some that you think ought to be here, and are not.

Dave.

[Oct 04 2004, last modified Nov 03 2007]

800hp clock (+6, -3)
A car for my wife (+8, -2)
A talking head (+1)
Air Hockey Slide (+3)
Air tube extending stilts (+11)
Alternative rolling robot moon explorer (+3, -1)
Audio printing (+3)
Bends in the Benz? (+5, -4)
Bicycle blower (+1)
Blimplane (+5)
Body part removal (+1, -10)
Breathing hand dryer (+9, -1)
Car jack brake (+31, -2)
Car jiggler (+7)
Car stereo type (+6, -4)
Confounding Confetti (+7)
Crowd gatherer (+1, -1)
dc electric fence (+1)
Devilment door (+29)
Drowning alarm (+2)
ELWB motorbike (+2)
Empty whiteboard marker (+1)
Enhanced gyroscopic force generator (0)
Escaping the big crunch (+5, -11)
Fake Cell Phone and arm (+6, -4)
Fiber optic collimated headlights (+2, -1)
Fiendish Faucet (+6)
Flat tyre indication (+2)
Galactic Positioning System (+1, -1)
Get the Icon! (+16, -1)
Happy Fun Ball (+6)
Heat-shrink hair-band (+2)
Hole punch 'staple' (+5, -1)
Hot shave (+5, -1)
Huge rolling wheel (+5)
Hydrogen from solar furnace (+2, -2)
Immortality on the net (+2, -1)
Increase solar furnace max temperature (0)
Inductive escapement (+5, -1)
Intensive tree burning for country (+4, -1)
Invisible raft (0)
JCB controls (+3)
Jogging energy saver (0)
Kindergarten maze (+11)
Kite pump (+4)
Light up the light switch (+12, -1)
Ling's Leg-up (+5)
Lowrider bike (+7, -1)
Magnetocaloric supercooler at home (+1, -1)
Meeting cost (0)
Megapixel multiplier (+4, -2)
Memory stick advertising (+5, -2)
Moon ring (+8)
Morphing heads (+1)
Mosaic removal (+1)
motorcycle built for two #2 (+2, -1)
National no national day (+1, -4)
Nitrogen powered bicycle (+3, -1)
Noisy lamp (0)
Optical mouse (+7)
Orange Juice in an Orange (+29, -1)
Photochromic whiteboard (0)
Photocopier cleaner (+1)
Piezo fly (+1)
pinhole microscope (+1)
Pneumanic transport (+5, -3)
Pogostick hovercraft (+3)
Portable solar concentrator with high concentration (+3, -4)
PSU/UPS combo (+3, -1)
Reduced emission vehicle (+1, -3)
Scale rule marker (+1)
Self bouncing ball (+13, -1)
Shortcut for Excel lock reference (+1)
Singing golf ball (+2)
Smoke ring exhaust (+21, -1)
Snake roller (+7)
soft switches (0)
Spin based binary (0)
Spinning egg test (+3)
Spring Steel hook and loop fastener (+4)
Spy drone with no fuel (-10)
Staple empty indicator (+11)
Strobed Alloys (+2)
Taxi flag (+5)
Telephone cable theft detection (+1)
Tesla streetlighting (+18, -3)
Test spares inventory for cars (+2)
The best brain ever (+3, -5)
The biggest croissant (+10, -1)
Throttle control (0)
Tight-arse wallet (+12)
Tiled snakes and ladders (+4)
Toast Man (+3, -1)
Toroidal bubbles (+5, -1)
Tube conveyor (+9, -3)
Tubot (+7, -2)
Twin dish (+3)
Unergonomic engineering (+6, -1)
Vacuum fishing (+1, -2)
Vacuum triggered food expiry (+5)
Vertical thrust braking (+16, -2)
very fast spinning rotor (+2, -2)
Village clock (+1)
Vortex ring fan (+12)
Waffle meter (+17)
Wave powered vessel propulsion (+1)
Wireless doorbell (+10, -3)

halfbakery