First the nonogram solves like this:
Then
we note the paper-folding tag and "On-and-onogrami" wordplay hinting at origami. The flavor text also mentions catching bugs and crystal ball. So we fold our paper into the "cootie catcher" aka "fortune teller" origami.
We see
ORIGAMI on the outside! We must be on the right track.
Then we
open it and see
WATER bOMb! Which is both a weapon and a toy (and also another origami)!
So we
fold a water bomb and get
a six sided die! One fine toy.
