Here are some question/responses that I wrote a few years ago, and that we’ve worked on mainly with our older daughter (now 6). I’m re-posting them in case others might find this a good springboard for your own catechizing. The answers are admittedly a bit short and simplistic, but I figure that (and the repetition) makes it easier for memorization and parents can build on the concepts later.
Q: Who is Jesus?
A: Jesus is God’s Son.
Q: Why did Jesus come to earth?
A: God sent Jesus to live and die in the place of every sinner who would ever trust in Him, love Him, and obey Him.
Q: What do we celebrate this week?
A: The death and resurrection of Jesus.
Q: Why did Jesus die?
A: The wages of sin is death. Jesus died for the sins of other people. Jesus took their punishment. And Jesus perfectly obeyed God on their behalf.
Q: Which people did Jesus die for?
A: Every sinner who ever puts their trust in Him, loves Him, and obeys Him. To them, Jesus is a merciful Savior, Lord, and Treasure.
Q: Are you a sinner?
A: Yes. All have sinned and fallen short of the glory of God.
Q: What are sins?
A: Disobeying Mommy and Daddy and not doing what I should.
Q: Was Jesus a sinner?
A: No. Jesus never sinned. Jesus rose from the dead because death had no power over Him.
Q: Do you need a Savior?
Q: Who is the only Savior to whom you should go?
A: Jesus, God’s Son, who lived and died on behalf of every sinner who would ever trust in Him, love Him, and obey Him.