The sounds of students “oohing” and “aahing” echoed all the way to the main entrance at Sawnee Elementary.The noise was coming from students in Planet Sawnee, the school’s new science lab. They were watching as Wes McCall, chairman of the school’s Parent Teacher Association science lab, used a hammer to smash minerals and test for hardness. McCall said he hopes to maintain that same level of excitement felt during the lab’s grand opening Friday.Several other elementary schools in Forsyth have a science lab, but Sawnee Principal Eileen Nix said her school didn’t have “enough room to do something like this for a long time.”But thanks to the opening this year of Kelly Mill Elementary, Sawnee has fewer students and more space.