Prints

Finger prints.

I always wanted a detective kit when I was younger. They used to sell little finger printing kits for kids, where you could dust on white powder or black powder and then lift a print and tape it to the opposite colored paper (white powder on black paper or black powder on white...) I think a little booklet came with them and probably also a magnifying glass. The round kind with a handle (- Which I'd also seen used to burn leaves or burn initials into a seesaw!)