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)!

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.