The first thing Indigo noticed when he stepped into the classroom was the balloons. It was out of the ordinary, see, so they stood out to him. And he wondered what the reason was for them being there. Balloons usually meant a celebration of some sort. There were no words on these balloons to give him a clue as to their purpose. Was it somebody's birthday? Somebody else's birthday? Today was Indigo's birthday, actually.

"Hello professor," he greeted as he headed to take a seat. The balloon mystery was interesting, but Indigo was a pretty patient person so he had no problem waiting to find out the purpose.