I have a great admiration for the women and men who thought out ways of making their life easier by using science. Even if they didn't know they were doing it.
So in homage to the first men and women who reckoned there must be an easier way of dragging heavy loads across rough ground than with a sled, I give you......
including, of course, all the business of axles and whatnot!
And after that there was the principle of levers and springs. Without which we would not have a great many items essential to our lives, including
The Hole Punch
And then there is all the discoveries of light, magnification, reflection, lenses and a whole bagload of stuff without which half of us wouldn't be able to see properly, our internal lives would be a mystery (just think X-rays, scans etc) and life generally would just not be as we know it!
Binoculars are quite complex enough for me!
Go over to Carmi at writteninc to see all the other technological ideas others have come up with!