Good idea - Create a photo book of famous structures from around the world to use in your block center. Great for kindergarten, preschool, and homeschool classrooms! Includes a link for a free structure book!
Measurement Inquiry - For CAP classrooms, this could double in the discovery center with a graph (children put their name under the color they think has the most)-- Use non-breakable PLASTIC jars and hot glue the lids on.
Primary level science station for magnets. "Is it magnetic?" This sorting science station is appropriate for pre-k, kindergarten, primary grades, or preschool. With younger children be careful to ensure items size isn't a choking hazard.