After several minutes, Keefer had a large pile of green and blue balloons next to him. He glanced around. Most students were attaching things to the ceiling and walls. Well that's boring! he thought. He unholstered his wand and pointed it at the very topmost balloon.

"Wingardium leviosa," he said excitedly. He watched as the lone green orb ascended. When it was about seven feet off the ground, he concentrated on letting the balloon float there. In this same manner, he filled the room with floating blobs of color just above head-level.

There! It's perfect! Now it's time to grab some grub!