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.
Creative Family Fun: Estimation Station for After School Fun or Math center in school! recently set up this Estimation Station to give my graders a fun math challenge after school. It took only a few minutes to set up. I just gathered a few items fro