What Is the Difference Between a ‘Planet’ and a ‘Dwarf Planet’?

Imagine you're playing with toys in a big room. A planet is like the toy that moves around the room and cleans up after itself, while a dwarf planet is like the toy that moves around but doesn’t clean up. Planets are bigger and do more work, while dwarf planets are smaller and don’t do as much.

In 2006, scientists decided that Pluto didn’t clean up enough to be called a planet anymore, it was reclassified as a dwarf planet. That means there are now only eight planets in our solar system.