I teach Sunday School regularly (age 5-10s). We generally have 45-60 mins and have 12-20 children.
Later next month we have a Churches Together service, which may involve an unknown number of additional children. I want to plan a one-off session, which would be welcoming for children that don't know each other.
I've been mulling it over for a while, waiting in vain for inspiration. We could do games/activities; a team-building-type thing; communal craft activity or anything really. We have plenty of staff, space and resources.
Please let me know if you have any fool-proof great ideas!