Preschool and Kindergarten Spring Lessons, Activities, Crafts, and Printables. Spring into spring with our flowers, spring kids crafts, spring preschool activities, weather activities and lessons, and color green printables. In spring, the earth warms significantly, causing new plant growth to spring forth, giving the season its name. Spring is a time to fly kites, to enjoy colorful rainbows, and to celebrate the birth of baby animals.