Sgt. Frog is a show about alien frogs who come to the planet Pekopon. My friend and I both truly enjoyed this show, though my friend hated it at first. I would recommend Sgt. Frog for adults and children over the age of 7. You can also read the manga.
Watch it on:
Netflix
http://www.funimation.com/sgt-frog
Watch it on:
Netflix
http://www.funimation.com/sgt-frog