Unless you know of a place where we could pick them for free, buying them at the store would be best.

[He sees no need to get overly elaborate for something that's just intended to lure a pair of criminals out.]

I have a few plans in mind in case they do target us.

[He pulls out a pair of flashlights, shining one of them at the wall so Rapunzel can see how bright the lights go.]

These are fully charged, bright, and have enough weight to them that they can be used as blunt weapons as well. I suspect their shadow magic is dependent to an extent on having shadows present. We can disrupt where the shadows fall with the flashlights.

[He's also crafted a few elementary flashbangs.]

We can also throw them off with these. Do not look directly at wherever you throw these. They're designed to temporarily blind and daze someone.