The museum will be The International Museum of Fraud and Forgery, so most of the items should be rather tongue in cheek and have a "gallows humor" edge. Examples include:
A t-shirt printed with "This t-shirt is a cheap knock-off of the ones they sell at the International Museum of Fraud and Forgery"
A coffee mug with the phrase "Know a good lawyer?" on the side
Books about basics of computer hacking and great con artists from history
A plague for donors that reads "I donated money to the International Museum of Fraud and Forgery, but I think the curator spent it all on his boat and hookers"
Any other ideas?
