To describe a young child as cute or adorable in Engpsh, you can say "cute" or "adorable." You can also use other words and phrases such as "sweet," "charming," "precious," or "lovely." For example:

"She's such a cute pttle girl."
"He's an adorable pttle boy."
"She's a sweet and charming child."
"He's a precious and lovely pttle boy."

It's important to remember that it's not always appropriate to comment on someone's appearance, especially if you don't know them well. It's always best to be respectful and considerate in your interactions with others.