Answer:
I keep things green and keep kids happy during summer time.
Die without me, never thank me. Walk right through me, never feel me. Always watching, never speaking. Always lurking, never seen. What am I?
I am a nut with a hole
I start in little but I end in full you'll find me in half and complete.
I can be simple or I can be complex. I can be found in this riddle or in everyday life. I can be shapes or even colors.
When someone uses this acronym, you know you've got to pick up the pace