These detective party favors were a hit at my child’s birthday! The invisible ink pens and activity notebooks kept the kids entertained, and the spy theme was a fun touch. The quality of the items was great, and everyone enjoyed the mystery-solving games. I only knocked off one star because the instructions on how to use the invisible ink pens were a bit unclear at first, but once the kids figured it out, they had a blast. Overall, a fantastic party favor set!