Wonderopolis is a site I just found out about from my amazing PLN/friends at Edcamp El Paso. This is a site that is dedicated to sparking the mind and imagination of children. It answers that age old question, "what do you wonder about?" through the use of video. Also, it has a great section called, "wonder of the day" which is a great learning moment for students.
I highly recommend checking out Wonderopolis by clicking here!!!