I stole my friend's apple core, threw it on the ground, stamped on it for a little while, then kicked sand over it, and then jumped on it some more until you could no longer see it.
I bought a 12 pack of soda and threw the plastic piece in the ocean to demonstrate how it can float. Then a sea lion started to wear it like a necklace, it pretended to be choking. =3
I didn't even know it was earth day yesterday, it should be a major holiday.