Answer:
Lighter than what I am made of. More of me is hidden than seen. What am I?
I hop around and deliver eggs at Easter.
First you see me in the grass dressed in yellow gay; next I am in dainty white, then I fly away. What am I?
I am a box who holds keys but not locks. With the right combination I may unlock your soul
I go from house to house a messenger small and tight. Whether it rains or snows I sleep outside at night.
It flows out of the soil, It burns you if it boils, And holds us in its coils, More valuable than gold, As black as it is old.