Lucy wants to watch a show on the telly. She presses the button on the remote control to turn on the television. But nothing happens. What is most probably wrong?

In school you will have learned about electricity, switches, batteries and bulbs. It is very useful. Electricity powers bulbs and keeps our lights on. It runs our televisions and computers, and makes our fridges work. Electricity can be turned on and off by switches. Some things need batteries to work. Batteries store energy. But the energy in batteries does run out.