This video provides a basic introduction into simple circuits which includes a battery, a resistor, a switch, and a LED or light emitting diode.
Electric Current: https://www.youtube.com/watch?v=r-SCyD7f_zI&t=2s
Series Paralle Circuits: https://www.youtube.com/watch?v=7mdc-lRrW1c
Basic Electronics: https://www.youtube.com/watch?v=uXr4lXYjXuU&t=7s
