Let's get invisible

Title: Let's get invisible. (Pun on "Let's get physical")
Numberjacks on mission: Three and Six.
Meanie(s): Numbertaker.
Plot: Things seem to go missing at the beach, or are they? They seem to have lost their visibility. Three and Six need to stop the Numbertaker from stealing the visibility of things, but how are they gonna stop the Numbertaker when he took away his own visibility?