It's certainly something "different" in terms of collectables for the average WIX reader.
I looked at the news page and read "The illustrated wooden expo-box will be available exclusively in the United States for sale in shops, and will contain 12 assorted pieces of the two bombs: Little boy (series code A1) and Fat man (series code A2)."
http://www.manhattanproject.it/E/highpage1.html
Can you imagine if I purchased one of these on the U.S. and was trying to take onboard the flight home to the UK as hand luggage ?
On a more serious note ~ wouldn't these make great seal items for the CAF B29/B24 Squadron ?