The nine elementary school students enrolled in Jim Cham-berlain’s weeklong robotics and engineering camp spent as much time experimenting and building as they did laughing and playing.Friends Aayushi Chaudhary, Riya Manchanda and Tanvi Gujral appeared to be having the most fun Wednesday. The girls decided the camp, held at South Forsyth High School, would be a great way to spend a week together over the summer. “I’ve always liked playing with Legos and building stuff,” said Chaudhary, a rising fifth-grader at Shiloh Point Ele-mentary.