For many, summer days and weeks have become a time when children are involved in a seemingly endless array of camps and summer programs. In fact, families have been involved in arranging for and scheduling such activities for months! But there are also those wonderful non-scheduled, serendipitous days when trips to the zoo, a museum, or a walk on a nature trail, just happen. Summers are memory makers for everyone. And mathematics learning can be an important part of those memories.