ELI5: Explain Like I'm 5

how does fusion energy work

Fusion energy is a kind of energy that comes from combining two different kinds of atoms together. It is like when you put two pieces of Lego together to make a bigger spaceship or something else. When two atoms combine, they create a lot of heat and light, just like when you put two pieces of Lego together. This heat and light is used to power things like homes and cars.