papyrus.                                                                                      

Locks were another making of the Egyptians. These were made to prevent the endless robberies. They made a wooden crossbar that was almost entirely enclose except for some space for the key and the pins. They dropped these pins into cavities, which locked the door. To unlock it, they slid the key into the opening, which pushed the pins out of the way, enabling the door to open.            

The water clock was an invention that was very valuable to the religious leaders of Egypt. The citizens of Egypt weren't too concerned about clocks for their own time. So why would they need clocks? For their religious ceremonies, of course! The religious leaders needed a better and more specific way to tell time than how high the sun was in the sky. Why did they need to tell the time more precisely? Well, they had certain ceremonies that they believed they had to do in order to please their gods. So they invented the water clock. It was a large funnel that was marked into 12 sections for their hours, and it dripped down. The leaders just measured the water to tell the time. (However,I still prefer a watch. Well, at least the these clocks didn't need any batteries!)

Plywood has been made for thousands of years; the earliest known occurrence of plywood was in Ancient Egypt around 3500 BC when wooden articles were made from sawn veneers glued together crosswise. This was originally done due to a shortage of fine wood. Thin sheets of high quality wood were glued over a substrate of lower quality wood for cosmetic effect, with incidental structural benefits. This manner of inventing plywood has occurred repeatedly throughout history.