Nunri and Toraclis examine the traps and notice they're very primitive affairs. Spiked branches and dropped weights, these sorts of things, all traps which require someone to manually trigger them. Seems like the main obstacle facing the ratmen was lack of resources. They were probably a mismanagement of limited resources. They were probably limited by whatever refuse they could find in the sewer, but by trying to cover as much of the large room with traps as possible, they were always suffering from shortages of resources. You assume that by cannibalizing all the unfinished traps, you could probably finish two of them. Maybe three if you supply the missing resources yourselves.
OOC:
Tell me what you have in mind and we'll see how feasible they are...
As for Herradine, you're waving your hands in the air which confuses the females ratkin as they're not sure what you're trying to convey here... They understand you're trying to communicate with them, it's just that the concept of drawing shapes in the air seems to be beyond them...