Question:

I keep things green and kids happy during the summer time. What am I?

Answer:

ɹǝlʞuᴉɹdS ∀

Citations:

https://www.upsidedowntext.com/

https://www.brainzilla.com/brain-teasers/riddles/oRVNN9VK/i-keep-things-green-and-keep-kids-happy-during-summer-time-what-am-i/

https://www.freepik.com/free-photos-vectors/august