Usually for Christmas they do the TBT Fair (as the Christmas event, since I remember the tree decorating contest from last year) which when you enter the contests, you earn tickets for spending on the collectibles ^^
Last year they had:
TBT Fair 2014 badge
pinwheels (red; the green are contest prize only and I think they're discontinued)
balloons (green and blue; they might add more this year)
feathers (red, yellow, green, blue, purple, pink, white, and the rare contest-prize and unexchangable rainbow)
~ irl items were prizes as well such as stickers, games, etc, but most were limited or raffled
pinwheels (red; the green are contest prize only and I think they're discontinued)
balloons (green and blue; they might add more this year)
feathers (red, yellow, green, blue, purple, pink, white, and the rare contest-prize and unexchangable rainbow)
~ irl items were prizes as well such as stickers, games, etc, but most were limited or raffled
