Those usually use a nibbler attachment on a drill which will have s little guard over it so it doesn’t nibble you. No blades to say, more like a tiny shear.
They’re meant for thin sheet metal so they’re pretty strong and not completely devoid of danger, but you can add guards and make it so.
They’re pretty cool for the kiddos and crafting!
Here’s a super over complicated version to understand the concept.
https://www.instructables.com/DIY-Cardboard-Cutting-Machine-The-Bibbler-Nibbler-/
Or can just like get one of these and a drill with a zip tie. Poke thst through a nice solid topped box and cut away.
Have fun!
The real crazy part about this is that butter is actually at like an all time low right now. The protein craze has made a great big market for wey protein wich used to just be a byproduct of making butter. So now there’s a bunch of butter back stock which should lower the prices drastically.