• Image of Knock-Knock Stuff: Inner-Truth Pen (Hot Pink or Neon Yellow)
  • Image of Knock-Knock Stuff: Inner-Truth Pen (Hot Pink or Neon Yellow)
  • Image of Knock-Knock Stuff: Inner-Truth Pen (Hot Pink or Neon Yellow)

Knock-Knock Stuff: Inner-Truth Pen (Hot Pink or Neon Yellow)
Flip the Pen to find out the truth