Each color printed tin contains 10 colored pencils, 10 stamps and 3 inkpads, plus a color 'idea sheet'. Kids press their fingers into the non-toxic ink pads, then stamp their fingertips onto a piece of paper. Kids then can use the included stamps (featuring eyes, dinosaur teeth, and more) and colored pencils to add detail to their prehistoric creations.

The Spy Pen features invisible ink that can only be revealed using the UV black light in the cap.
— Mary Porter Green, owner of Curiosity Zone in Ashburn, Va, told TDmonthly in a July 2013 survey that this was one of her store's best-selling toys.