Intergenerational (mixed ages)
We have done intergenerational Bible Schools before and they went fine. It has its good and bad points like everything else, but if it works in your set up, I think your idea of doing it for one rotation - not all the time - is great.
I would say that the biggest challenge and thing to keep in mind it not to teach only to the top or bottom ability level.
- You have to have a variety of activities so you do not have students who are constantly bored because it is too easy or lost because it is too hard.
- It can also help to plan activities where the children can work cooperatively with the older ones matched with a younger child to help.
We have always pulled out our preschool children into their own class and not tried to put them into the intergenerational groups. That is just too big an ability span.
Good Luck!