What are those?????

One of Jace's new favorite activities is watching bubbles float around his head. At first he wasn't too sure of them and didn't quite like them landing on his head and face, but they don't bother him any longer and he loves to reach for them over and over.....and over again. Sometimes a bubble will even land in his eye and he just rubs his eye for a moment and then he's back in the game.