Pull the little tabs and they are ready to go!
These worked well and I liked that they came in different colors (the ink is clear). One thing to keep in mind is that the message can show on certain types of paper/surfaces. Regular paper typically works fine; the ink should fade and turn invisible until the special light is used, at which point the message is clear and easy to read.
I'm not sure how long the ink or light are designed to last but I am happy with this purchase for the price (I purchased a more expensive spy pen that fell apart when I tried to use it). Even an adult I showed it to was excited about it. Would be great as favors for a detective or mystery themed party, as part of a treasure hunt or attached to a gift with a special message. There wasn't anything special about the way they were packaged but there were no defective pens in my order (I tried them all).
|Color||Party Favors Ideas Gifts and|
|Manufacturer recommended age||3 years and up|
|Product Dimensions||23.62 x 16 x 2.03 cm; 70 Grams|