What is Mass can be converted into energy?

What if your toy car could turn into a super fast rocket just by going really, really fast?

Mass is like how much stuff something has, it’s what makes you heavy when you’re on the scale at the doctor's office. Energy is like the power that moves things, like when your toy car zooms around the room.

Now imagine you have a tiny, super-fast toy car, so fast, it’s almost like light! When something goes really fast, its mass can change into energy. It’s kind of like how a compressed spring stores energy, if you let it go, that stored energy turns into motion.

If your toy car was going as fast as light, it would have so much energy that part of it could become something new, almost like turning your toy car into a tiny explosion of power. Scientists call this Einstein’s equation, and it looks like E = mc². But you don’t need to remember that part, just know that going super fast can make mass turn into energy, like magic but with real science behind it!

So when things go really, really fast, they can become super powerful, just like your toy car turning into a rocket.