The basics: Taste the power! ; Go with the flow ; Applying pressure ; Let's make a battery -- Switching: Getting connected ; Investigating a relay ; A relay oscillator ; Time and capacitors ; Transistor switching ; Light and sound -- Soldering: Joining two wires together ; Roasting an LED ; A wearable multivibrator -- Chips, ahoy!: Emitting a pulse ; Set your tone ; An alarming idea ; Reflex tester ; Learning logic ; The unlocker ; The button blocker ; Flipping and bouncing ; Nice dice -- What next?: Magnetism ; Tabletop power generation ; Loudspeaker destruction ; Making a coil react ; One radio, no solder, no power ; Hardware meets software ; Nicer dice.