A Gift for Santa Herself

From: Miss Izzy
Description: What's going on? The townspeople won't let me into the Christmas department store for hours, and Adeline keeps giving me these mysterious smiles... By the way, she gave me a lovely music box. She told me to wind it up. Can you help me?
Completed: This melody... That’s right, it’s the same tune the townspeople came up with today while they were making magical toys. There’s also an engraving here! "To Miss Izzy, in memory of her first Christmas." Oh, I’m sorry, I’ll be right back... I think a snowflake got into my eye...