The play experience with the Project Mc2 A.D.I.S.N. Journal is rather simple but it is fun. The “Nerdy” bracelet opens it when waved over or held near the logo on the front of the journal. Inside there is a space for a smart phone (however my Samsung Note 5 did not fit so it will have to be smaller) and there is a composition book with some puzzles and games inside. There is an invisible ink pen and a UV light (which is hidden in a compartment in the spine of the book). The front page of the journal is a sort of dry erase board page where you write the message in invisible ink and then use the UV light to read it. As a note, the ink is really hard to read in a well-lit room, it will have to be a little darker to get the full benefit. There is no additional paper or anything for actual journal keeping. If you lose the “Nerdy” bracelet there is a button on the side of the journal that will open it when pressed.
When the book opens it says “OMG I’ve been waiting to play with you all day!” and when it closes it says “oh don’t go!” I didn’t find any way to turn this feature off or adjust the volume.