ELI5: Explain Like I'm 5

3D television

Okay kiddo, so you know how we can watch movies and TV shows on our regular TV, right? Well, 3D television is a bit like that, but with an extra layer of special technology that makes the pictures look like they're popping out of the screen and coming right at you!

You see, regular TV shows and movies are what we call "2D," which means they only have two dimensions - length and width. But with 3D television, there's a third dimension - depth - that makes everything look more real and lifelike.

The way it works is kinda complicated, but basically, your eyes see things from slightly different angles, and your brain puts those images together to create a sense of depth. With 3D TV, the technology tricks your eyes into seeing two slightly different images on the screen, and your brain puts them together to make it look like the picture is coming out of the TV and into your living room!

Of course, you need special glasses to make it work properly - those big, chunky glasses you may have seen in movies or at the movie theater. These glasses have special lenses that help your eyes see the different images on the screen separately, so your brain can do its 3D magic.

So, why don't we all have 3D TVs? Well, they can be pretty expensive, and not all shows and movies are filmed in 3D. Plus, some people don't like wearing the glasses, or they can get headaches from watching too much 3D.

But it's definitely a cool technology, and who knows - maybe someday all TVs will be 3D, and watching TV will be like stepping right into the show or movie!