The tradition of Posada started in Mexico - a re-enactment of Mary and Joseph's journey to Bethlehem, seeking shelter (posada means 'inn').
In the UK, many churches now hold a Posada (sometimes called Travelling Crib) during Lent using nativity figures which travel from home to home before arriving in church on Christmas Eve. The Church Army resource is a good starting point, but parishes have adapted the tradition to suit their context:
The variations are endless! It's a great opportunity for mission, for building relationships between people in a congregation, for bringing generations together. You might even need to have 2 Posadas happening at the same time!