Have you ever played in a sandbox? The Australian desert is like a very big sandbox where there are a lot of sand and dirt but not many plants or animals.
When you go to play in the sand at the beach, do you notice that it gets really hot? That's because the sun's rays shine down on the sand and it heats up. The Australian desert is a lot like that - it's really hot during the day and can get really cold at night.
The Australian desert is also known as the "outback." This is where you might see kangaroos and other animals that only live in Australia. There are also some plants that can survive in the hot and dry conditions like cactus.
There are some places where people live in the Australian desert, but it can be hard because there is not a lot of water. They have to find ways to collect water and sometimes they have to travel far to find it.
So, just like playing in a sandbox can be fun, visiting the Australian desert can be really interesting and a unique experience.