Arnold decided he wasn't ready to call it a night. He allowed Zack and Griffin to rest while he checked out the academy. He knew very little about the life the boys lead before he came along. He only knew they were at a school of some sort. Looking to learn more about the school Arnold left the boys room and headed out. 
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Katherin thought she wanted to call it a night but when she got back to the dorm she found that she wasn't ready to go inside. No winter was whispering to her. So instead of going inside Katherin decide to play with her powers. She was going to do something fun. Katherin decided to do something she hadn't done since she was little. She was going to make a snow fort.