I need spy themed activities to keep 4 10-year-olds busy during a sleepover. How about wire-tapping the neighbors? Building and using pin-hole cameras? Steaming open the principal’s mail? Looking up their teacher’s financial statements online? No? How about jumping on the trampoline, a scavenger hunt and video games?
Dust for fingerprints. Or you could stage a crime scene and have them investigate.
Oh rats, Dean beat me to the first idea. So on to some of the others.
Decoding messages written in invisible ink.
It can get a bit expensive to buy for ALL the kids, but there are some neat “spy” toys at Toys R US. Just set them up as a game (sort of like the scavenger hunt). so that they each need to use the SINGLE spy item (spy goggles, blue light to read secret messages, etc).