5.  The Automobile

This is a controversial selection since few can argue that the modern automobile is a far cry from the Model T of 1912, but how different is it really? Certainly the basic function of the combustion engine has not changed, nor has the way one operates an automobile. Ford’s rickety cars had transmissions, clutches, brakes, headlights, left-handed steering, and everything else we still see today. Obviously the technology has improved dramatically, and great grandpa never had the luxury of having a radio, a heater, or cup holders, but the basic modus operandi of the automobile itself remains largely indistinguishable from 1912 and probably won’t become truly different until they learn to fly—or at least hover.

4.  The Sailboat

Yes, canvas has been replaced with stronger and lighter nylon, and wooden hulls and masts have been supplanted by fiberglass or aluminum, but the basic idea remains the same: harness the wind to move large vessels across the water with minimal effort and cost. Even their sleek lines haven’t changed all that much, nor has their means of operation. Really, there is just no way to improve on a good idea, making the sailboat one of the most timeless inventions in human history.

3.  Musical Instruments

Despite the introduction of different materials and electronics to music (i.e. the keyboard and the electric guitar) musical instruments have changed little over the last century, which is why the piano, guitar, mandolin,violin, drums, trumpet, saxophone—you name it—are still made and performed much the way they did in 1912 (or 1812, for that matter). While music itself has changed dramatically (though not always for the better), the raw noise that comes out of these instruments, and the way they are played, remains timeless. Even the way the best hand-made instruments are manufactured is a throwback to an earlier era, when there was no substitute for skill and patience, and people took pride in crafting a quality musical instrument.

2.  The Incandescent Light Bulb

Ever since Edison produced his first practical light bulb way back in 1880, not much has changed with the overall construction. It looks the same, functions the same and, allowing for inflation, costs much the same as it did in 1912. Less energy-efficient than the newer fluorescent and LED lights, however, the incandescent may not be around much longer, and is, in fact, slated to be phased out of production in the United States in 2014.  Which is too bad because, since the older bulbs often used heavier filaments, they were more robust and therefore long-lasting, making them superior in some ways than their modern counterparts.

1.  The Flush Toilet

Perfected in the late-nineteenth century, this hallmark of civilization has remained largely unchanged since its inception (or, one might surmise, its perfection) in roughly 1880. The basic mechanism inside the tank may be made out of plastic instead of rust-prone metal, but one of the great innovators of the modern toilet, Thomas Crapper, would still recognize the thing and appreciate it for the remarkable piece of engineering it remains to this day. One of the few truly indispensable devices they got right the first time, the immortal porcelain throne has stood the test of time very well, thank you.