"The first day of spring is one thing, and the first spring day is another." -Henry Van Dyke
As the weather warms and spring days are no longer a rarity, head outdoors to explore the changes happening around you. Phenology, the study of the relationship between weather and climate and the life cycle stages of plants and animals, can be observed in your own back yard. Here are four fun ways to pique young scientists' interest in nature and phenology this spring.