A solar power tower is like a giant magnifying glass that uses the sun's energy to make electricity. Think about how you use a magnifying glass to focus sunlight onto a piece of paper to make it light on fire. A solar power tower works the same way, but instead of lighting a piece of paper on fire, it uses mirrors to focus sunlight onto a special liquid that gets really hot.
This liquid boils and turns into steam, just like water does when you heat it up on the stove. The steam then moves through a turbine that spins a generator, which makes electricity that can be used to power homes and buildings.
The tower is really tall, like a very long pole, and the mirrors are all around the base of the tower, facing the sun. The tower also has a special coating that helps it absorb more sunlight and get even hotter.
So, in summary, a solar power tower is a type of big magnifying glass that uses sunlight to heat up a liquid, which makes steam that spins a generator to create electricity.