Nucleoside

Okay, imagine you're trying to build a toy house. To put it together, you need different pieces, right? Now imagine that our body is trying to build a bigger thing called DNA, which is like a big instruction manual telling our body how to function. But to do that, it needs different little pieces just like our toy house needs different pieces to be put together.

A nucleoside is one of those little pieces that our body needs to build DNA. It's made up of two smaller parts: a sugar molecule and a building block called a base. Just like how we can mix and match different toy house pieces to create different houses, our body can mix and match different nucleosides to create different combinations of DNA. These combinations of DNA tell our body how to grow and function.

So, to sum up: nucleosides are little pieces that our body needs to build DNA, which is like an instruction manual for our body. They are made up of a sugar molecule and a building block called a base, and we can mix and match different nucleosides to create different combinations of DNA.