For David' 8th birthday, he requested a spy party. I did a little research and came up with this secret agent/spy party.
Each secret agent was greeted by the Spymaster (AKA the Abba), and put their fingerprint and signature on an ID card created by the Ima. They got a notebook and pencil and lined up for some Secret Agent calisthenics and other spy warmup tricks.
Encyclopedia Brown, my favorite boy detective. You'd think this was a boring party trick but in fact, they were very into it!