https://www.instructables.com/Prank-Pen-In-30-Seconds/
Prank Pen in 30 Seconds : 3 Steps - Instructables
Prank Pen in 30 Seconds: Not all pranks have to be elaborate. Check out this prank that can be done in 30 seconds or less. Let's go! Grab a pen with a cap...
30 seconds 3prankpenstepsinstructables