Gutter water play -- used to do this every summer with my mom& summer camps! Love the connectors and props, that looks really stable. So fun!
Go for a Nature Color Hunt on your natural playground! - place different colors of paper in the sections of an ice cube tray. Children can go on a scavenger hunt across their natural playscape to find the colors in nature.
Mud pie kichrn at a Delightful Daycare in Portland My Great Outdoors