"I am the Alpha and the Omega, the first and the last, the beginning and the end.”
-Revelation 22:13 (ESV)
Answers for Youngsters
It may be hard to imagine, but God has always been there. God will always be there. No one made God, because God made everything.
This is what makes God so important and special: He does not need anyone else, but everyone else needs Him.
Answers for Older Kids
Imagine setting up a row of dominos, and then pushing them down. For the dominos to fall, something has to push them. There always has to be something that comes first. God is that first cause for everything else that exists.
Another way to say this is that anything that exists will either rely on something else, or be self-reliant. God is self-reliant. He doesn’t need anything outside of himself in order to exist. But the entire universe relies on Him.
The question “who made God” is actually one that has become more common in recent years, especially by skeptics who are trying to ask, if something needs to come first, why can’t the universe be the thing that came first?
The difference is that we can show that the universe had a beginning. But part of what makes the universe function is time. Inside of time, there is always past, present and future. But if God made time, then He isn’t subject to time. If God is outside of time, then nothing has to come before Him. As God himself says in scripture:
“I am the Alpha and the Omega, the first and the last, the beginning and the end.” (Revelation 22:13, ESV)