A bit is a tiny computer thing that is used to store information inside a computer. It's like a tiny switch that can be turned on or off, and it's either a 1 or a 0. Just like a light switch in your room that can be on or off. A group of 8 bits is called a byte, and bytes are used to represent letters, numbers, and other things that can be stored in a computer. So, just like your lego blocks, these bits and bytes are small building blocks that make up things on the computer, and they work together to create everything you see on your screen!