Lower Chest?

My little cousin is working his ass of in his basement with a crummy old bench and some dumbells. He's getting great results though. His bench has no decline....any advice on some execises that he can do for his lower pecs? He's a little nervous to come to the gym just yet....maybe when he turns 16 he says. Thanks in advance guys.....

try pull overs...layin with your upper back on the bench, gripping dumbbell with both hands and taking it back over your head and back up. Also try different angles with flies in order to try and focus that part of the chest.