Chicco NextFit Convertible Car Seat. Pros: Packed with safety features, led by a removable infant insert designed for smaller/younger babies. Cons: The cup holder doesn't fit a lot of sizes, but this is a minor inconvenience.
Thomas Edison Lightbulb. Let there be Light! Historians agree that Thomas Edison was not the inventor of the electric light bulb, but he did produce the first commercially viable one.
What Edison invented was the first incandescent light that was practical, that would light for hours and hours. He and his muckers also had to invent hundreds of other parts to make the light bulbs in your home work. Light switches, electric meters, wiring--all these had to be invented too. This took several years of experiments. Ludwig Boehm of Germany carefully blew the glass to make light bulbs. Charles Batchelor of Great Britain tested one thing after another to make the filament, the tiny thread that glows inside a light bulb.