We have booked a surprise trip for me, DH and DS1 8 and DS2 5 to visit Santa in Lapland on 18th December. I was planning on revealing this trip to them somehow using their advent calendar. We have a fabric advent calendar and we usually put a little sweet/chocolate in the pockets. I was thinking of maybe writing an invitation from Santa then cutting it up so its like a jigsaw and they get a piece each day up to the 17th, or maybe spelling out a message with a letter in each pocket. Does anyone have any other ideas that might be better? Im not sure if this is a good idea or will it just fall flat?