Always ask an adult for help before you begin cooking!
"Al dente" means to cook pasta until it is still just a tiny bit firm, not overcooked and mushy.
Combining flour and butter to use to thicken sauces is called a roux (pronounced "roo") - you'll see this technique in other recipes so try to remember it!
You can always add meat to your pasta - cooked chicken or shrimp would be great in this recipe.