Circuits

Close the right switches so current can flow in a complete loop through the bulb, and learn why a bulb-free path steals all the current.

Every board starts wired shut. Open the switches that hand current a bulb-free shortcut, and learn why that shortcut is called a short circuit.

Every board here holds more than one bulb and highlights just one. Learn the two ways to darken the others: starve them of current, or hand the current an obstacle-free road around them.