I've set up a preschool of sorts for Caroline (39 months old). I'm trying to occupy her long enough to get John Isaac started on school...while Schaeffer naps.
John Isaac was at co-op Monday and she was chomping the bit to get in there. We "played" for 2 hours...me showing her how to do the activities long enough for comprehension but not long enough for mastery. This was valuable time since I got a feel for what she liked to do, what she could do, and what was too hard for her. The activities were tweaked accordingly. She loves order -thus lots of sorting.
If you have littles, here are ideas for your preschool.
Tongs with bells, (sensory & practical life) 2 sizes into silicon muffin cups
Montessori activities John Isaac did as a youngster, as well as old(er) blog posts labeled preschool.