It seems that every year one of my confirmation students will ask a question like this one: "Can God make a rock so big He can't lift it?" I like how the website, "Let us Reason," answered the question:
Can God make a rock so big He can't lift it? If He can't lift it then He is not all powerful. Then the rock has more power than God and whatever is more powerful than God is God.
If God can make it, He can lift it. If He can create it, He can destroy it. What He creates is under His jurisdiction, under His control. It can never have equality.