the other night i was up late at night (it happens a lot when you've got a baby!) and while i was trying to get him back to sleep i heard a faint sound. at first i thought it was his mooing cow stuffed animal, but it was very faint and i thought the battery might be dying on it. the sound kept going, and i noticed it was coming from our community tank, and then i knew what it was. the frogs were croaking! it was so faint, i doubt i'd have heard it unless it was the silent time of the night. it was so freakin cool!