This pin is a part of the Characters in the Park Series.   A stained glass element is a feature of this pin and when held up to the light it is transparent.
Carl Fredricksen and Ellie Fredricksen are both featured on the pin.    They're in the park, sitting on a red and white checkered picnic mat. They are  looking at each other. We see a picnic basket in between them. The background has bushes and balloons, a light blue stained glass.