These were part of a Pop Tarts promotion; I've had them forever but never even opened them. Includes two pens: one writes in invisible ink then the other reveals the secret message when scribbled over the first. They've never been used, are still sealed but are decades old so I can not guarantee they'll work. Even so, I suspect they're exceedingly rare, especially still in the package.

Please scrutinize the photos and don't hesitate to ask for more if there's anything else you'd like to see, although I'm not willing to break the seal on the package. A local buyer is welcome to pick them up at my home in Southeast Massachusetts to save the shipping time and cost. Of course I'm happy to combine shipping so do check out my other items just in case. I leave feedback as soon as I notice an item's paid for; my buyers are always happy with my items and service so I don't need to wait to see the feedback they leave me. Thanks for looking!