We use Godly Play as one of our rotation stations at least 50% of the time. You know who enjoys it the most? The 4th-6th graders! You should see their faces light up when they see it on the schedule.
We tried including our preschool/pre-K in the main rotation last year. The kids did just fine but some of the teachers had difficulty adjusting to such a broad age range. This coming year we've been blessed with a teacher who will teach the preschoolers in their own space. We still plan to have them do rotation lessons that coordinate with what the older kids are doing.
Corine