Read Luke 2:22-40 as a family.
After Jesus was born, Mary and Joseph took Him to the temple to be dedicated to the Lord. If your kids were dedicated when they were younger, share that experience with them (if you have photos of that day pull those out and show them). At the temple, Mary, Joseph, and Jesus met two people, Simeon and Anna. Simeon and Anna were waiting patiently for the Messiah to come and as soon as they saw Jesus, they knew he was the one they were waiting for.
After meeting Jesus both Anna and Simeon were filled with hope and comfort that God would continue to do what He said He would. What did they do after this experience with Jesus? They gave thanks and praise to God and returned to their own towns to begin telling others about Jesus. Just like Simeon and Anna, we should be giving thanks and praise to God and telling others about all He has done for us by sending his son Jesus.