By Jeremiah Hassel A seven-year-old girl who tragically died after a sand hole collapsed on her at a beach has been pictured as tributes pour in for the ‘sweet’ student. The sad incident happened while Sloan Mattingly, seven, and her older brother Maddox, nine, were playing on a beach in Lauderdale-by-the-Sea, a town in the northern end of Fort Lauderdale on Tuesday afternoon. They decided to dig a hole, but it sadly collapsed on them, completely burying Sloan and partially swallowing her brother. Their parents and some passersby tried their best to dig them out, with some even using boards to…