You could ring them and ask: doesn't sound like a cheap trip to me especially as it's really for children and therefore liable to involve a number of fares
I won a trip there many years ago and was also given spending money so I can't really advise on this. It is NOT a place for vegetarians though. I was VERY hungry when I was there. You either eat reindeer or starve and even if I weren't a veggie, there's no way I could've chomped on old Rudolph. If you go Chiara, have a great time. It's really lovely. By the way, I saw Santa... the REAL one. !
is this for buying things in Santa's workshop or similar? It'll depend on whether you've got kids with you, I suppose; as ichkeria suggests, it's probably worth contacting the tour operator involved to find out exactly what shopping facilities are available; also whether a meal is included.