I'm not into role playing games.
It always baffled me, if you have a games master, why on earth do you need big thick books of rules. How hard is it to say "you hit it," or "you loose your grip and fall." Or the other way, why have a games master if you have big thick books of rules.
I got in trouble for creating charts and more dice rolls for creating towns as you go. Apparently rules are bad and an enthusiastic DM is bad. Who knew.
A games master helps keep thing secret, I guess. But, then why have rule books? Games masters are supposed to be the creative ones, are they not.
Anyway.
Insects look ok. And rat swarm. But nothing you can't get from almost anyone.
The insects look like they came out of a $2 USD kids Toy bag. So, theres another idea for cheat figures. Have a look in the Toy idle of your local discount stores. Especially if you need lots. Check eBay also. Spiders, beetles, ants, all types of creepy crawlies. Also other Toy animals that may work.