I'd also suggest a betta. In fact I'd kinda like to get another myself, my last one passed away a year or so ago (they tend to have a 1-3 year lifespan depending on age when you get them). I felt it was overall pretty easy to care for and a beautiful pet, they can easily make it through weekends when you are away.
you guys should get one from luvgold or the other way around I can't remember her name fully, but she needs help with getting rid of some bettas and her a GORGOUS!!