A parallel circuit connects components along separate, independent pathways, giving electricity multiple routes to travel. In this activity, wiring the switches side-by-side creates a logical OR Gate, meaning the LED lights up when you press either the first switch, the second switch, or both at once. This setup ensures that if one path opens or a component fails, the rest keep on working.

A series circuit connects components along a single, continuous loop, making the electrical current to flow sequentially through every device. In engineering, this configuration ensures that current remains uniform throughout the loop, while the total voltage is divided across each individual component according to its resistance. Because the entire system relies on an unbroken chain, a failure or open switch at any point instantly halts all current flow, a foundational behavior used to implement logical AND Gates in digital circuitry where every input must be active to achieve an output.