That is pretty neat! For our plant unit. What happens when you put Indian corn in a pan of water? I think this is a good learning experience for the children and gives them something to look forward to when they come to class everyday.
Paper Plate Clock Activity for Learning to Tell Time
For preschool: put ABC's or have them match the labeled nuts (shapes, numbers, letters) to the bolt. Nuts and Bolts Spelling Practice: build fine motor skills and practice spelling/phonics skills! This would make a fun center activity.