Ok, say, you child is hold a broken spoon like in this picture
Then you say "Sweetie, throw this broken spoon away, I will give you the good one / normal one"
What is the opposite expression of "a broken spoon": "a normal spoon" or "a good spoon"?
If we say "a good spoon", then people may think of its quality and besides "a bad spoon" may not be broken.
Also, "a normal spoon" sounds weird.