Computers can be built out of greedy cup siphons instead! Take a look at this water computer. | Steve Mould

Primed Siphon: liquid moves until the water levels are equal- curious combination of the effects of gravity, molecular cohesion, and atmospheric pressure. The tube is hollow and pre-filled with water, and the spherical shells on each end are cups also full of water. With each end of the tube submerged into each cup, atmospheric pressure holds the water in the tube until the siphon can be placed to connect the glasses. ➡️ Follow the link my profile for more info and where to get many of the amazi