Since I've just upgraded to a 60 gal tank, I'm giving my 10 gal to my niece and nephew. My sister, who is going to be the responsible person, wants an easy to care for tank, but my niece and nephew want exciting fish. My nephew is still trying to figure out how he can fit a manta ray in there. I was hoping people could recommend interesting fish that are easy to care for. I was thinking maybe Platys since they're so colorful. Thanks for your input!