TRICKSTER PEN

Trickster pen for students. Pla printed. Design solidworks.
Inside there is just a normal BIC pen.
i devised this cool gadget for students since it was one of my favorite tools when i was a student.
i don't say it's cool to use one, but let's be honest, anyone at school made his own cards with formulas and don't get caught,
it's always better to have a plan B if your memory fails you.
have fun.