Fingerprint collection science experiment set. Includes 1 stainless steel dish, 1 feather, 1 metal spoon, and aluminum powder. How about for experiments? Place the aluminum powder on the dish, gently sprinkle it with the feather onto a desk or glass cup that you've touched with your finger, and brush off the excess powder to reveal fingerprints. This is the same principle that police use at crime scenes. We do not recommend using this on house walls as cleaning them can be difficult.