What is the best SIMPLE invention you can think of?

Two I can think of are cats eyes in the road and the spring mousetrap. Both very effective Also the toilet seat invented by the Irish. It was then modified by the English who put a hole in it.

Answers:
the wheel
Tin Opener
The staple.

And after that, the staple lifter.

;-)
the clothes hanger.
Automatic electric butt-wipers. Not as elegant as the wheel, but, oh well.lol
How about that cardboard you put in front of your car dashboard so it won't get so hot inside?
super glue-really really useful
the chair, the wheel, the door, the plate.
Bin bags, apparently the person who invented it is loaded.
shoes, they save us a lot of injuries, or the match which has properably caused a few.
toothbrush? I don't no who invented it though but fair play to them.You can't beat oral hygine.

Smile.
electric bulb
The 'mute' button or feature for television remotes.
The Wheel has got to be the simplest invention ever.
Shoes

Condoms
the cheese grater, I dont know why tho....
I think the humble potato peeler, I love the idea of an Irish toilet seat ha ha ha
make a big kite and fly in it.
chopsticks : 2 sticks to pick stuff up :-)

rubbing 2 stones or sticks to light a fire maybe.
Maybe the best simple wsa team. A team is a group of human who have complementary skills. for example a team for elephant hunting in the ice age.
vacuum flask
The screwdriver
The clothes peg. Saves your clean clothes being blown around the garden.
an OFF button!!
the wheel , knife and fork, and a vibrator (rampant rabbits)
The ring pull.buuuurrrrrp
Pencils and electricity CERTAINLY not school
the safety pin! where would we be without it?
Flint knife
The kaleidoscope - it was such a simple invention that the inventor went bust trying to keep his patent!

the safety pin

the crossword puzzle

(I have also found a brilliant list of inventions on Wikipedia below - on which, to be honest, I found the crossword puzzle was invented !)
The wheel were would we be without it? cars,planes,rolling mills, even the cave man used it! Without it we would have nothing, can you name just one thing where the wheel, is not used in some way or another?

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