Resistors are used to use-up or slow down electricity The concept is difficult to explain. If you have more questions, or a good way to explain then contact us! They are rated in Ohms, and Kilo Ohms (1000 Ohms).
Capacitors store small amounts of electricity. They are used mostly in radio transmitters and receivers. There are two types. They are electrolytic and ceramic. There is usually a correct and incorrect way around to attach them to the battery. They are rated in Farads, or more usually micro Farads.
These are like LEDs but do not light-up. They use very little electricity, and only let electricity flow one way. There are two types. Silicon and Germanium. Like a one-way valve in a tap
