Via had been silently listening at the foot of the class. She went to get two balloons at the Professor's table and used the spell for levitation. "Pointing her wand at the first balloon, "Wingardium Leviosa," she muttered. It didn't worked. She tried again and for the second time with all her focus on it. "Wingardium Leviosa!" Perfect. The balloon rose up to the air for a few seconds and fell back at her table. She again tried at the other one.