This is our second time through Hallelujah, and I love it even more than I did last year. My kids are still young enough that we don't do all aspects of it, but can slowly add in the bits and pieces year by year. They don't love Handel's Messiah quite the way I do yet, but I hope, by going through this book each Christmas, they eventually will.
If you're looking for a family Advent tradition, I highly recommend picking up Hallelujah. You can just listen to the music selections each day, or add in other Christmas hymns, poetry, and scripture memorization. There are also fun ideas for celebrating December feast days and other family Christmas traditions. It is a lovely addition to Advent, whether you do it all or just bits and pieces.
Update, 12/22/21:
This is our third time using Hallelujah to listen to Handel's Messiah during Advent, and we still love it. It's one of my favorite Christmas morning time traditions. The girls are starting to recognize parts of the Messiah, and they definitely remember the weekly Christmas poems and Scripture passages.
If you are looking for a kid-friendly Advent that includes music, scripture, and poetry, I *highly* recommend Hallelujah.
Update, 12/21/22:
This is year four of using Hallelujah during our December Morning Time, and it's still as beautiful as ever. I love how adaptable it is--you can just listen to the selections of the Messiah each day, or you can sing the Christmas hymn, read the poetry, work on the scripture memory, try out the recipes, and celebrate the feast days too. Each year, we pick the pieces that best fit in with our schedule and workload.
You are supposed to listen to the last section on Christmas Day. We're bad at that. This year, we hit Part 3 of the Messiah and just... kept going. It's a lovely way to anchor our Advent anticipation.
Update, 12/25/23:
Year five of reading Hallelujah and this was the first year we didn't read ahead and actually hit Worthy is the Lamb on Christmas day like we are supposed to. Still one of our favorite Advent reads and one will will continue to return to in future Decembers.
Update, 12/24/25:
Moving chaos caused us to miss Hallelujah last year. It was such a sweet tradition to resume this year.