I really like my tomato frogs, but they're nocturnal. They tend to spend the whole day buried, but they do come out every other night and they are definitely fun to watch. I have three of them, check them out.
http://www.frogforum.net/tomato-frogs-painted-frogs-microhylids/18839-tomato-frogs-update-watch-them-grow.html
They're really fun to feed and watch eat, they inhale their food faster than my pacs do. They just aren't active during the day and some nights you won't see them either. When they are babies will you will see them every night and sometimes during the day.