Teaching your children the rosary
Pray one decade together, not a full rosary, and let children announce the mysteries and hold the beads. What a child remembers is not the words but that this happened, in this house, with these people.
The version of this that fails is the one where a family sits down to pray five decades, two children are melting down by the second, and the whole thing becomes a discipline problem attached to a prayer. Nobody remembers that fondly, and it usually does not survive the month.
The version that works is shorter than you think and gives the children more to do than you would expect.
Pray one decade
One decade is the family target. Four minutes.
This is not a lowered bar for children, it is the right amount for most families, and it is what the majority of families who sustain this actually pray. A decade most nights beats a full rosary attempted twice and dropped.
If everyone is willing on a given night, pray more. But the standing expectation should be the one a tired Tuesday can meet.
Give them jobs
A child who is participating behaves differently than a child who is being prayed at.
Announcing the mystery. Give one child the job of saying what the decade is about. They will start looking forward to their turn.
Holding the beads. The physical object matters more to a child than the words. Let them move each bead.
The second half of the Hail Mary. In a group the prayer is usually split: one voice prays up to "the fruit of thy womb, Jesus," and everyone answers with "Holy Mary, Mother of God." That answering half is short, it repeats ten times, and children learn it fast because it comes around again immediately.
Naming the intention. Let each child say who the decade is for. This is often the moment you find out what a child is actually carrying.
What to expect by age
Three and four. Presence, a held bead, and a few words of the Hail Mary in the right places. That is full participation at this age. Do not correct pronunciation.
Five to seven. Most can follow a whole decade and will have the Hail Mary memorized simply from repetition. This is the age where announcing the mystery lands well.
Eight to twelve. Able to lead a decade, and old enough for the mysteries to be actual stories rather than titles. Tell the scene in two sentences before the decade rather than just naming it.
Teenagers. The participation gets quieter and more grudging, and it still counts. A teenager who is present and silent is present. This is not the age to make it a battle, and the practice is more likely to survive being optional than being enforced.
Let them move
The requirement is not stillness. Small children can pray lying on the floor, walking around the room, or on a lap.
If sitting still is the actual objective, the prayer becomes the vehicle for a behavior lesson, and children can tell the difference. They will remember which one it was.
When to pray it
Attach it to something that already happens every day: after dinner before anyone leaves the table, or as part of bedtime. A time that has to be found each day will not be found.
Bedtime works for a lot of families because everyone is already in one place and slowing down. It also means the last thing in a child's day is a prayer, which is worth something on its own.
What they actually take with them
Very few adults who grew up with a family rosary remember specific nights. What they remember is that it happened, that their parents did it too, and the sound of the responses.
That is the durable part, and it is not produced by praying it well. It is produced by praying it often, in a way short enough that everyone can keep doing it.
If you want the full sequence yourself first, the complete guide has it, and what people pray for is a good source of intentions for children to name.