Day 5 -- This day belongs to Mark.
For Mark, I'd get him 2 round trip plane tickets, so he could fly home for the holidays. I'm sure he'd like to visit his family and friends in California. I'd make sure there are 2, so he can bring a friend with him. My feeling is he'd either bring Jackson or Jr.
I'd also get Mark something small and cute, like reindeer antlers that he could wear for the holidays. I love it when the boys are dressed holiday cute. Oh, maybe a santa hat or holiday Mickey ears...hmmm. He'd look adorable in any of it.
Tomorrow is the last day (and it belongs to Youngjae).