The alphabetic principle is a fancy way of saying that the letters you see on the page stand for sounds in our language. Just like how we use different shapes and colors to represent things like stop signs or blueberries, we use different letters to represent the sounds we make when we talk or read.
For example, when we see the letter "B", our brains know that it makes the sound "buh" just like when we say "ball" or "baby". We can use all these different letters and sounds to create different words, just like how we use different Legos to create different buildings or animals.
So, the alphabetic principle is really just like a secret code that helps us understand how language works and how we can use it to communicate with each other!