Create a DIY Spy Kit for a kid! Direct link to original post. Instructions are not very in depth, nor does she provide sources for some of the items in the kit, but it's a good starting point. Could also easily be called a "Kid's CSI Kit".
Scene of the Crime Writing: Set up a fake crime scene. Then have all the students gather around and examine the scene of the crime. They jot down notes to record their observations then write a story about what they think happened. Fun fiction writing!