Super simple craft idea, easy for kids and can be done for so many holidays/events. Just get canning jars (craft stores sell all sizes and shapes of clear glass jars). The glue whatever you'd like to the bottom, make small vignettes, personalized favors
Use a glass container, any glass container, even a round fish bowl! Place artificial snow ( or salt ) at bottom for the base. Add some greenery from the outdoors with the artificial birds and nest from a craft store or garden shop.