A friendship book. You buy a nice notebook - any size you like - and get family and friends to write little verses or homilies, or draw a picture, stick a photo or whatever, each on signing it with the date. Your contribution is the special one that goes on the first page.
Then your brother takes it away with him and carries on 'collecting' through the years.
I started one for my American cousin this Christmas. We met up in 2005 for the first time in 26 yearsand we've promised it won't be that long again. I've told him he has to present that book to me when we meet up again, so I can put in another little ditty - or he's in trouble.